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/generic/hack-4.9/220-gc_sections.patch

@@ -261,7 +261,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  #define TRACE_SYSCALLS()
 @@ -172,7 +172,7 @@
  #ifdef CONFIG_SERIAL_EARLYCON
- #define EARLYCON_TABLE() STRUCT_ALIGN();			\
+ #define EARLYCON_TABLE() . = ALIGN(8);				\
  			 VMLINUX_SYMBOL(__earlycon_table) = .;	\
 -			 *(__earlycon_table)			\
 +			 KEEP(*(__earlycon_table))		\