ARM: ux500: enable ux500 EXT4_FS and LBDAF support by default

EXT4 file system and LBDAF are used commonly, should be enabled by default.
Signed-off-by: Hongbo Zhang <hongbo.zhang@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/configs/u8500_defconfig

@@ -5,7 +5,6 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
-# CONFIG_LBDAF is not set
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_ARCH_U8500=y
 CONFIG_MACH_HREFV60=y
@@ -105,6 +104,7 @@ CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT2_FS_POSIX_ACL=y
 CONFIG_EXT2_FS_SECURITY=y
 CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y