linux: update to 4.4.28

mk/kernel-ver.mk

@@ -26,10 +26,10 @@ KERNEL_VERSION:=	$(KERNEL_FILE_VER)-$(KERNEL_RELEASE)
 KERNEL_HASH:=		48171714923f52b03e667011426cb62089fd3df9eb4be1227b781188d680c408
 endif
 ifeq ($(ADK_TARGET_KERNEL_VERSION_4_4),y)
-KERNEL_FILE_VER:=	4.4.20
+KERNEL_FILE_VER:=	4.4.28
 KERNEL_RELEASE:=	1
 KERNEL_VERSION:=	$(KERNEL_FILE_VER)-$(KERNEL_RELEASE)
-KERNEL_HASH:=		d231bc70a94139d0100996d44c420cff2e07a7fd95c8c2c4e0bd031aaf56b5aa
+KERNEL_HASH:=		841acb9109a893ab2f60b02355e1527e80fa09251e46339317f6984d69b1f4fc
 endif
 ifeq ($(ADK_TARGET_KERNEL_VERSION_4_1),y)
 KERNEL_FILE_VER:=	4.1.30

target/config/Config.in.kernelversion

@@ -41,7 +41,7 @@ config ADK_TARGET_KERNEL_VERSION_4_8
 	depends on !ADK_TARGET_SYSTEM_QEMU_ARM_VERSATILEPB_NOMMU
 
 config ADK_TARGET_KERNEL_VERSION_4_4
-	bool "4.4.20"
+	bool "4.4.28"
 	depends on !ADK_TARGET_ARCH_NDS32
 	depends on !ADK_TARGET_ARCH_NIOS2
 	depends on !ADK_TARGET_CPU_MIPS_MIPS32R6