sifive-fu540: config: Add mmc0 as a boot target device

Add the mmc0 device as a BOOT_TARGET_DEVICES.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
1 file changed