linux: update to 4.9.20

mk/kernel-ver.mk

@@ -16,10 +16,10 @@ KERNEL_RELEASE:=	1
 KERNEL_VERSION:=	$(ADK_TARGET_KERNEL_GIT_VER)-$(KERNEL_RELEASE)
 endif
 ifeq ($(ADK_TARGET_KERNEL_VERSION_4_9),y)
-KERNEL_FILE_VER:=	4.9.16
+KERNEL_FILE_VER:=	4.9.20
 KERNEL_RELEASE:=	1
 KERNEL_VERSION:=	$(KERNEL_FILE_VER)-$(KERNEL_RELEASE)
-KERNEL_HASH:=		43b444915cbde67d47b6b614e277c14856a55a63698054298be3a16fe3babae4
+KERNEL_HASH:=		48660806dd32fb8dcbcf5932291bf6cc7d29240070372230871e0f56fea81341
 endif
 ifeq ($(ADK_TARGET_KERNEL_VERSION_4_6),y)
 KERNEL_FILE_VER:=	4.6.2

target/config/Config.in.kernelversion

@@ -27,7 +27,7 @@ config ADK_TARGET_KERNEL_VERSION_GIT
 	select ADK_TARGET_KERNEL_IMAGE if ADK_TARGET_SYSTEM_BEAGLEBONE_BLACK
 
 config ADK_TARGET_KERNEL_VERSION_4_9
-	bool "4.9.16"
+	bool "4.9.20"
 	depends on !ADK_TARGET_ARCH_CRIS
 	depends on !ADK_TARGET_ARCH_METAG
 	depends on !ADK_TARGET_ARCH_NDS32