ARM: configs: at91: sama7: Enable MTD_UBI_FASTMAP

Use fastmap to accelerate the attach procedure.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
[nicolas.ferre@microchip.com: removed unrelated changes]
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20220420134740.193563-2-tudor.ambarus@microchip.com

arch/arm/configs/sama7_defconfig

@@ -94,6 +94,7 @@ CONFIG_MTD_NAND_ATMEL=y
 # CONFIG_MTD_NAND_ECC_SW_HAMMING is not set
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_FASTMAP=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=1