kernel: bump 4.9 to 4.9.116

Refreshed all patches

Remove upstreamed patches.
- 103-MIPS-ath79-fix-register-address-in-ath79_ddr_wb_flus.patch
- 403-mtd_fix_cfi_cmdset_0002_status_check.patch
- 001-4.11-01-mtd-m25p80-consider-max-message-size-in-m25p80_read.patch
- 001-4.15-08-bcm63xx_enet-correct-clock-usage.patch
- 001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch
- 900-gen_stats-fix-netlink-stats-padding.patch

Introduce a new backported patch to address ext4 breakage, introduced in 4.9.112
- backport-4.9/500-ext4-fix-check-to-prevent-initializing-reserved-inod.patch

This patch has been slightly altered to compensate for a new helper function
introduced in later kernels.

Also add ARM64_SSBD symbol to ARM64 targets still running kernel 4.9

Compile-tested on: ar71xx, bcm2710
Runtime-tested on: ar71xx

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

target/linux/ixp4xx/patches-4.9/116-sidewinder_fis_location.patch

@@ -1,15 +1,15 @@
 --- a/drivers/mtd/redboot.c
 +++ b/drivers/mtd/redboot.c
-@@ -30,6 +30,8 @@
- #include <linux/mtd/partitions.h>
+@@ -31,6 +31,8 @@
  #include <linux/module.h>
+ #include <linux/mod_devicetable.h>
  
 +#include <asm/mach-types.h>
 +
  struct fis_image_desc {
      unsigned char name[16];      // Null terminated name
      uint32_t	  flash_base;    // Address within FLASH of image
-@@ -47,7 +49,8 @@ struct fis_list {
+@@ -48,7 +50,8 @@ struct fis_list {
  	struct fis_list *next;
  };
  
@@ -19,7 +19,7 @@
  module_param(directory, int, 0);
  
  static inline int redboot_checksum(struct fis_image_desc *img)
-@@ -75,6 +78,8 @@ static int parse_redboot_partitions(stru
+@@ -76,6 +79,8 @@ static int parse_redboot_partitions(stru
  #ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
  	static char nullstring[] = "unallocated";
  #endif

target/linux/ixp4xx/patches-4.9/600-skb_avoid_dmabounce.patch

@@ -10,7 +10,7 @@
  
  	/* Get the HEAD */
  	skb = kmem_cache_alloc_node(cache, gfp_mask & ~__GFP_DMA, node);
-@@ -1223,6 +1226,10 @@ int pskb_expand_head(struct sk_buff *skb
+@@ -1224,6 +1227,10 @@ int pskb_expand_head(struct sk_buff *skb
  	if (skb_shared(skb))
  		BUG();