brcm2708: Update brcm2708-gpu-fw package

Problem - rapsberry pi 3 b/b+ does not boot with bcm2710 images!

How Raspberry Pi boots Actualy?

When Raspberry is switched on GPU is activated.
1. GPU execute First stage bootloader from ROM.
First stage bootloader mount the FAT boot partition on the SD card
and execute second stage bootloader (bootcode.bin).
2. Second stage bootloader (bootcode.bin) activate SDRAM.
Load the GPU firmware (start.elf).
3. GPU firmware (start.elf)
  a) display Rainbow splash.
  b) read firmware configuration file config.txt and
     split the RAM using fixup.dat.
  c) loads a cmdline.txt
  d) enables the CPU.
  e) loads the kernel image configurable via config.txt

In your target/linux/brcm2708/image/config.txt
 493 ## kernel (string)
 494 ##     Alternative name to use when loading kernel.
 495 ##
 496 #kernel=""
it is not configured!

But in your target/linux/brcm2708/image/Makefile
  75   KERNEL_IMG := kernel8.img
  76   DEVICE_TITLE := Raspberry Pi 3B/3B+
you have kernel8.img

GPU Firmware search order by default for a PI 3 is:
kernel8.img if found boot in 64 bit mode
kernel8-32.img if found boot in 32 bit mode
kernel7.img if found boot in 32 bit mode
kernel.img if found boot in 32 bit mode

But a PI 2 will start the search from kernel7.img and
a PI 1 only looks for kernel.img.

Оbviously the kernel has been found.
But something goes wrong and the device is restarted.

In your package/kernel/brcm2708-gpu-fw/Makefile
  11 PKG_NAME:=brcm2708-gpu-fw
  12 PKG_VERSION:=2017-08-08
  13 PKG_RELEASE:=e7ba7ab135f5a68b2c00a919ea9ac8d5528a5d5b
boot loader is 10 monts old.

In conclusion, the best way to solve the problem is
to update the boot loader!

Fixup_cd.dat and start_cd.elf files are not necessary.
These are used when GPU memory is set to 16 MB, which disables
some GPU features.
I did not remove them just in case!

cheers

Signed-off-by: Christo Nedev <christo.nedev@gmail.com>
(backported from c335649629)

package/kernel/brcm2708-gpu-fw/Makefile

@@ -9,8 +9,8 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=brcm2708-gpu-fw
-PKG_VERSION:=2017-08-08
-PKG_RELEASE:=e7ba7ab135f5a68b2c00a919ea9ac8d5528a5d5b
+PKG_VERSION:=2018-05-16
+PKG_RELEASE:=0f5f899ccec1c2ef8bba02aa49700b4ec19b4199
 
 PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/$(PKG_NAME)/rpi-firmware-$(PKG_RELEASE)
 
@@ -33,7 +33,7 @@ define Download/bootcode_bin
   FILE:=$(RPI_FIRMWARE_FILE)-bootcode.bin
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=bootcode.bin
-  HASH:=b5928ef5253774362014f9e7de856397a932514fe1bc5d7f7817a73c0e10e863
+  HASH:=c9eb5258766fabf7127e790b257f106e2717f0ccaaed37544b970b0d113956fc
 endef
 $(eval $(call Download,bootcode_bin))
 
@@ -41,7 +41,7 @@ define Download/fixup_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup.dat
-  HASH:=d95fcac57de7ab71e863a115fd60444f6099cb2ea100f4a68b2c606f79e775ed
+  HASH:=8a6311e73d0f349be9b8424db0644fd8f48aaf721f3f2f487488c83d7316cbdf
 endef
 $(eval $(call Download,fixup_dat))
 
@@ -49,7 +49,7 @@ define Download/fixup_cd_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup_cd.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup_cd.dat
-  HASH:=28f3ec8388df4e0c47489f8370a29ca81dbc536fe7db9978342865b5d093ec36
+  HASH:=973b008aae9711d57ddce4f058354fe5a0b4725dd825673f784a2e2754da1f28
 endef
 $(eval $(call Download,fixup_cd_dat))
 
@@ -57,7 +57,7 @@ define Download/start_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start.elf
-  HASH:=8712fb4e241a22f7a33de0f1d420e0fdfff237952aa685c907b91e59c8d487fa
+  HASH:=8e77c4cce7e44ced609e5046dd55f19cb7656a8ce4694e733b7eb6ecab915fe1
 endef
 $(eval $(call Download,start_elf))
 
@@ -65,7 +65,7 @@ define Download/start_cd_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start_cd.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start_cd.elf
-  HASH:=c600ab34bea389da10aac541bf2f9c62e5f774093b7e1f2f72c4637f9cf3a83c
+  HASH:=25223b479b7aca1d74c6f7a1829aba69fd14906ca5b25ae12571fe71ea2c5a4a
 endef
 $(eval $(call Download,start_cd_elf))