kernel: bump 4.9 to 4.9.87

- Refreshed all patches

Compile tested on: ar71xx
Runtime tested on: ar71xx

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

target/linux/generic/hack-4.9/300-MIPS-r4k_cache-use-more-efficient-cache-blast.patch

@@ -10,7 +10,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 ---
 --- a/arch/mips/include/asm/r4kcache.h
 +++ b/arch/mips/include/asm/r4kcache.h
-@@ -665,16 +665,48 @@ static inline void prot##extra##blast_##pfx##cache##_range(unsigned long start,
+@@ -665,16 +665,48 @@ static inline void prot##extra##blast_##
  						    unsigned long end)	\
  {									\
  	unsigned long lsize = cpu_##desc##_line_size();			\

target/linux/generic/hack-4.9/721-phy_packets.patch

@@ -101,7 +101,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	help
 --- a/net/core/dev.c
 +++ b/net/core/dev.c
-@@ -2943,10 +2943,20 @@ static int xmit_one(struct sk_buff *skb,
+@@ -2950,10 +2950,20 @@ static int xmit_one(struct sk_buff *skb,
  	if (!list_empty(&ptype_all) || !list_empty(&dev->ptype_all))
  		dev_queue_xmit_nit(skb, dev);
  

target/linux/generic/hack-4.9/902-debloat_proc.patch

@@ -393,7 +393,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
 --- a/net/ipv4/route.c
 +++ b/net/ipv4/route.c
-@@ -420,6 +420,9 @@ static struct pernet_operations ip_rt_pr
+@@ -423,6 +423,9 @@ static struct pernet_operations ip_rt_pr
  
  static int __init ip_rt_proc_init(void)
  {