kernel: bump 4.9 to 4.9.160

Refreshed all patches.

Compile-tested on: ar7
Runtime-tested on: none

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

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

@@ -136,7 +136,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  #include <net/protocol.h>
  #include <net/dst.h>
-@@ -529,6 +530,22 @@ skb_fail:
+@@ -533,6 +534,22 @@ skb_fail:
  }
  EXPORT_SYMBOL(__napi_alloc_skb);