mwlwifi: Updated to upstream stable release

mwlwifi was updated to a new stable. Included in this stable release are the
followin benefits:
- Fixed compiling for kernel 4.14
- Fixed crash on 88W8864 binary

Compiled and tested on: WRT3200ACM and WRT1900AC

Signed-off-by: Gabe Rodriguez <lifehacksback@gmail.com>

package/kernel/mwlwifi/Makefile

@@ -15,9 +15,9 @@ PKG_LICENSE_FILES:=
 
 PKG_SOURCE_URL:=https://github.com/kaloz/mwlwifi
 PKG_SOURCE_PROTO:=git
-PKG_SOURCE_DATE:=2018-02-26
+PKG_SOURCE_DATE:=2018-03-05
-PKG_SOURCE_VERSION:=51350a3e085a811179a270baddcae03ec9384f07
+PKG_SOURCE_VERSION:=b1b9a9e1c1beee30a8cce4038f4109727362ebe0
-PKG_MIRROR_HASH:=847f064b13e76e38402e118ee16569d49887051294eb99611cf025039721d4cc
+PKG_MIRROR_HASH:=720a3bc5ecb31419fdeebe02efba764ecc77815332114e97dc80f989d85a816f
 
 PKG_MAINTAINER:=Imre Kaloz <kaloz@openwrt.org>
 PKG_BUILD_PARALLEL:=1

package/kernel/mwlwifi/patches/001-remove-vfs_write.patch

@@ -1,92 +0,0 @@
---- a/debugfs.c
-+++ b/debugfs.c
-@@ -279,7 +279,6 @@ static void core_dump_file(u8 *valbuf, u
- 			   u32 append, u32 totallen, bool textmode)
- {
- 	struct file *filp_core = NULL;
--	mm_segment_t oldfs;
- 	char file_name[40];
- 	u8 *buf = kmalloc(length * 3, GFP_KERNEL);
- 	u8 *data_p = buf;
-@@ -292,9 +291,6 @@ static void core_dump_file(u8 *valbuf, u
- 	sprintf(file_name, "/dev/shm/coredump-%x-%x",
- 		region, (region + totallen));
- 
--	oldfs = get_fs();
--	set_fs(KERNEL_DS);
--
- 	if (append)
- 		filp_core = filp_open(file_name, O_RDWR | O_APPEND, 0);
- 	else
-@@ -317,15 +313,15 @@ static void core_dump_file(u8 *valbuf, u
- 			}
- 			data_p = buf + j;
- 			data_p += sprintf(data_p, "\n");
--			vfs_write(filp_core, buf, strlen(buf),
--				  &filp_core->f_pos);
-+			kernel_write(filp_core, buf, strlen(buf),
-+				     &filp_core->f_pos);
- 		} else
--			vfs_write(filp_core, valbuf, length, &filp_core->f_pos);
-+			kernel_write(filp_core, valbuf, length,
-+				     &filp_core->f_pos);
- 
- 		filp_close(filp_core, current->files);
- 	}
- 
--	set_fs(oldfs);
- 	kfree(buf);
- }
- 
-@@ -1339,7 +1335,6 @@ static ssize_t mwl_debugfs_ba_hist_read(
- 	u8 bmap0flag, nobaflag;
- 	char buff[500], file_location[20];
- 	struct file *filp_bahisto;
--	mm_segment_t oldfs;
- 	u8 *data_p = buff;
- 	ssize_t ret;
- 
-@@ -1355,13 +1350,10 @@ static ssize_t mwl_debugfs_ba_hist_read(
- 	memset(file_location, 0, sizeof(file_location));
- 	sprintf(file_location, "/tmp/ba_histo-%d", priv->ba_aid);
- 
--	oldfs = get_fs();
--	set_fs(KERNEL_DS);
- 	filp_bahisto = filp_open(file_location,
- 				 O_RDWR | O_CREAT | O_TRUNC, 0);
- 
- 	if (IS_ERR(filp_bahisto)) {
--		set_fs(oldfs);
- 		ret = -EIO;
- 		goto err;
- 	}
-@@ -1402,8 +1394,8 @@ static ssize_t mwl_debugfs_ba_hist_read(
- 
- 			/* Buffer is full. Write to file and reset buf */
- 			if ((strlen(buff) + 36) >= 500) {
--				vfs_write(filp_bahisto, buff, strlen(buff),
--					  &filp_bahisto->f_pos);
-+				kernel_write(filp_bahisto, buff, strlen(buff),
-+					     &filp_bahisto->f_pos);
- 				mdelay(2);
- 				memset(buff, 0, sizeof(buff));
- 				data_p = buff;
-@@ -1427,8 +1419,8 @@ static ssize_t mwl_debugfs_ba_hist_read(
- 				data_p += sprintf(data_p, "%8d\n", nobaflag);
- 		}
- 
--		vfs_write(filp_bahisto, buff, strlen(buff),
--			  &filp_bahisto->f_pos);
-+		kernel_write(filp_bahisto, buff, strlen(buff),
-+			     &filp_bahisto->f_pos);
- 		len += scnprintf(p + len, size - len,
- 				 "hole: %d, expect: %d, bmap0: %d, noba: %d\n",
- 				 baholecnt, baexpcnt, bmap0cnt, nobacnt);
-@@ -1441,7 +1433,6 @@ static ssize_t mwl_debugfs_ba_hist_read(
- 				 priv->ba_aid);
- 
- 	filp_close(filp_bahisto, current->files);
--	set_fs(oldfs);
- 
- 	ret = simple_read_from_buffer(ubuf, count, ppos, p, len);
-