kernel: bump 4.9 to 4.9.100

Refreshed all patches

Added new ARM64 symbol: ARM64_ERRATUM_1024718

Compile-tested on: ar71xx
Runtime-tested on: ar71xx

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

target/linux/ixp4xx/patches-4.9/090-increase_entropy_pools.patch

@@ -1,6 +1,6 @@
 --- a/drivers/char/random.c
 +++ b/drivers/char/random.c
-@@ -278,11 +278,11 @@
+@@ -279,11 +279,11 @@
  /*
   * Configuration information
   */

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);
-@@ -1222,6 +1225,10 @@ int pskb_expand_head(struct sk_buff *skb
+@@ -1223,6 +1226,10 @@ int pskb_expand_head(struct sk_buff *skb
  	if (skb_shared(skb))
  		BUG();