ARM: mvebu: enable UBI and UBIFS in mvebu_v7_defconfig

UBIFS is commonly used on Marvell EBU v7 platforms to store the root
file-system, so it makes sense to have those options enabled by default
in mvebu_v7_defconfig.
Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/configs/mvebu_v7_defconfig

@@ -60,6 +60,7 @@ CONFIG_MTD_NAND=y
 CONFIG_MTD_NAND_PXA3xx=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_SRAM=y
+CONFIG_MTD_UBI=y
 CONFIG_EEPROM_AT24=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_ATA=y
@@ -141,6 +142,7 @@ CONFIG_UDF_FS=m
 CONFIG_MSDOS_FS=y
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y
+CONFIG_UBIFS_FS=y
 CONFIG_NFS_FS=y
 CONFIG_ROOT_NFS=y
 CONFIG_NLS_CODEPAGE_437=y