ar71xx: hiwifi-hc6361: lift size limit on kernel and rootfs parts

The patch has been run-tested and the relevant dmsg logs are as the
following

    [    0.762447] Creating 5 MTD partitions on "spi0.0":
    [    0.767217] 0x000000000000-0x000000010000 : "u-boot"
    [    0.775139] 0x000000010000-0x000000020000 : "bdinfo"
    [    0.781014] 0x000000020000-0x000000fe0000 : "firmware"
    [    0.810558] 2 uimage-fw partitions found on MTD device firmware
    [    0.815043] 0x000000020000-0x000000170000 : "kernel"
    [    0.821925] 0x000000170000-0x000000fe0000 : "rootfs"
    [    0.827587] mtd: device 4 (rootfs) set to be root filesystem
    [    0.831937] 1 squashfs-split partitions found on MTD device rootfs
    [    0.837983] 0x0000005c0000-0x000000fe0000 : "rootfs_data"
    [    0.845621] 0x000000fe0000-0x000000ff0000 : "backup"
    [    0.851445] 0x000000ff0000-0x000001000000 : "art"

While at it, convert to new build method

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

target/linux/ar71xx/image/generic.mk

@@ -342,3 +342,23 @@ define Device/c-55
 endef
 
 TARGET_DEVICES += c-55
+
+
+define Build/uImageHiWiFi
+	# Field ih_name needs to start with "tw150v1"
+	mkimage -A $(LINUX_KARCH) \
+		-O linux -T kernel \
+		-C $(1) -a $(KERNEL_LOADADDR) -e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
+		-n 'tw150v1 $(call toupper,$(LINUX_KARCH)) LEDE Linux-$(LINUX_VERSION)' -d $@ $@.new
+	@mv $@.new $@
+endef
+
+define Device/hiwifi-hc6361
+    BOARDNAME := HiWiFi-HC6361
+    DEVICE_PROFILE := HIWIFI_HC6361
+    IMAGE_SIZE := 16128k
+    KERNEL := kernel-bin | patch-cmdline | lzma | uImageHiWiFi lzma
+    CONSOLE := ttyATH0,115200
+    MTDPARTS := spi0.0:64k(u-boot)ro,64k(bdinfo)ro,16128k(firmware),64k(backup)ro,64k(art)ro
+endef
+TARGET_DEVICES += hiwifi-hc6361

target/linux/ar71xx/image/legacy.mk

@@ -285,7 +285,6 @@ f9k1115v2_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env),14464k(rootfs
 dlrtdev_mtdlayout=mtdparts=spi0.0:256k(uboot)ro,64k(config)ro,6208k(firmware),64k(caldata)ro,640k(certs),960k(unknown)ro,64k@0x7f0000(caldata_copy)
 dlrtdev_mtdlayout_fat=mtdparts=spi0.0:256k(uboot)ro,64k(config)ro,7168k(firmware),640k(certs),64k(caldata)ro,64k@0x660000(caldata_orig),6208k@0x50000(firmware_orig)
 dragino2_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,16000k(firmware),64k(config)ro,64k(art)ro
-hiwifi_hc6361_mtdlayout=mtdparts=spi0.0:64k(u-boot)ro,64k(bdinfo)ro,1280k(kernel),14848k(rootfs),64k(backup)ro,64k(art)ro,16128k@0x20000(firmware)
 mr12_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,256k(u-boot-env)ro,13440k(rootfs),2304k(kernel),128k(art)ro,15744k@0x80000(firmware)
 mr16_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,256k(u-boot-env)ro,13440k(rootfs),2304k(kernel),128k(art)ro,15744k@0x80000(firmware)
 pb92_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,2752k(rootfs),896k(kernel),64k(nvram),64k(art)ro,3648k@0x50000(firmware)
@@ -577,22 +576,6 @@ Image/Build/EnGenius/buildkernel=$(call MkuImageLzma,$(2),$(3) $(4))
 Image/Build/EnGenius/initramfs=$(call MkuImageLzma/initramfs,$(2),$(3) $(4))
 
 
-define MkuImageHiWiFi
-	# Field ih_name needs to start with "tw150v1"
-	mkimage -A mips -O linux -T kernel -a 0x80060000 -C $(1) $(2) \
-		-e 0x80060000 -n 'tw150v1 MIPS OpenWrt Linux-$(LINUX_VERSION)' \
-		-d $(3) $(4)
-endef
-
-define MkuImageLzmaHiWiFi
-	$(call PatchKernelLzma,$(1),$(2),$(3),$(4))
-	$(call MkuImageHiWiFi,lzma,$(5),$(KDIR_TMP)/vmlinux$(4)-$(1).bin.lzma,$(KDIR_TMP)/vmlinux$(4)-$(1).uImage)
-endef
-
-Image/Build/HiWiFi/buildkernel=$(call MkuImageLzmaHiWiFi,$(2),$(3) $(4))
-Image/Build/HiWiFi=$(call Image/Build/Ath,$(1),$(2),$(3),$(4),$(5),$(6),$(7))
-Image/Build/HiWiFi/initramfs=$(call MkuImageLzma/initramfs,$(2),$(3) $(4))
-
 Image/Build/PB4X/buildkernel=$(call PatchKernelLzma,$(2),$(3))
 
 define Image/Build/PB4X
@@ -1078,8 +1061,6 @@ $(eval $(call SingleProfile,EnGenius,64k,ESR900,esr900,ESR900,ttyS0,115200,$$(es
 $(eval $(call SingleProfile,EnGenius,64k,ESR1750,esr1750,ESR1750,ttyS0,115200,$$(esr1750_mtdlayout),KRuImage,,0x61))
 $(eval $(call SingleProfile,EnGenius,64k,EPG5000,epg5000,EPG5000,ttyS0,115200,$$(epg5000_mtdlayout),KRuImage,,0x71))
 
-$(eval $(call SingleProfile,HiWiFi,64k,HIWIFI_HC6361,hiwifi-hc6361,HiWiFi-HC6361,ttyATH0,115200,$$(hiwifi_hc6361_mtdlayout),KRuImage))
-
 $(eval $(call SingleProfile,MyLoader,64k,WP543_2M,wp543,,ttyS0,115200,0x200000,2M))
 $(eval $(call SingleProfile,MyLoader,64k,WP543_4M,wp543,,ttyS0,115200,0x400000,4M))
 $(eval $(call SingleProfile,MyLoader,64k,WP543_8M,wp543,,ttyS0,115200,0x800000,8M))