ARM: mvebu: enable SRAM support in mvebu_v7_defconfig

SRAM support is needed for the hardware buffer management used by the
mvneta driver.

[gregory.clement@free-electrons.com: add commit log]
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/configs/mvebu_v7_defconfig

@@ -58,6 +58,7 @@ CONFIG_MTD_M25P80=y
 CONFIG_MTD_NAND=y
 CONFIG_MTD_NAND_PXA3xx=y
 CONFIG_MTD_SPI_NOR=y
+CONFIG_SRAM=y
 CONFIG_EEPROM_AT24=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_ATA=y