ARM: configs: at91: sama7: Enable MTD_UBI_BLOCK

Address read only block filesystems like SquashFS, and use MTD_UBI_BLOCK
to benefit of UBI's bit-flip handling and wear-levelling.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20220420134740.193563-3-tudor.ambarus@microchip.com

arch/arm/configs/sama7_defconfig

@@ -95,6 +95,7 @@ CONFIG_MTD_NAND_ATMEL=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_UBI=y
 CONFIG_MTD_UBI_FASTMAP=y
+CONFIG_MTD_UBI_BLOCK=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=1