config: bump linux kernel to 4.9.6 in synopsys defconfigs

With this commit we update ARC defconfigs with the following:

  - "snps_axs101_defconfig" and "snps_axs103_defconfig":
     - bump linux kernel version to 4.9.6
     - set up host linux headers to 4.9

Signed-off-by: Vlad Zakharov <vzakhar@synopsys.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/snps_axs101_defconfig

@@ -8,13 +8,13 @@ BR2_TARGET_ROOTFS_INITRAMFS=y
 BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_OVERLAY="board/synopsys/axs10x/fs-overlay"
 
-# Linux headers same as kernel, a 4.8 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_8=y
+# Linux headers same as kernel, a 4.9 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.8.6"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.9.6"
 BR2_LINUX_KERNEL_DEFCONFIG="axs101"
 
 # Bootloader

configs/snps_axs103_defconfig

@@ -9,13 +9,13 @@ BR2_TARGET_ROOTFS_INITRAMFS=y
 BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_OVERLAY="board/synopsys/axs10x/fs-overlay"
 
-# Linux headers same as kernel, a 4.8 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_8=y
+# Linux headers same as kernel, a 4.9 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.8.6"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.9.6"
 BR2_LINUX_KERNEL_DEFCONFIG="axs103_smp"
 
 # Bootloader