ARM: vf610m4: defconfig: enable EXT4 filesystem

Enable EXT4_FS to have rootfs in EXT[2-4].

Other changes are result of savedefconfig keeping minimal config (even
without enabling EXT4_FS, these would be present).
Signed-off-by: Nafzal mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/configs/vf610m4_defconfig

@@ -7,7 +7,6 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_EMBEDDED=y
 # CONFIG_MMU is not set
-CONFIG_ARM_SINGLE_ARMV7M=y
 CONFIG_ARCH_MXC=y
 CONFIG_SOC_VF610=y
 CONFIG_SET_MEM_PARAM=y
@@ -38,5 +37,5 @@ CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
 CONFIG_MFD_SYSCON=y
 # CONFIG_HID is not set
 # CONFIG_USB_SUPPORT is not set
+CONFIG_EXT4_FS=y
 # CONFIG_MISC_FILESYSTEMS is not set
-# CONFIG_FTRACE is not set