board/andes/ae350/uboot.config.fragment: support loading U-Boot in RAM

Do not disable SPL RAM support so the u-boot.itb programmed on
flash memory can be used.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/andes/ae350/uboot.config.fragment

@@ -1,6 +1,5 @@
 CONFIG_SPL_FS_FAT=y
 CONFIG_SPL_MMC=y
-# CONFIG_SPL_RAM_SUPPORT is not set
 CONFIG_SPL_OPENSBI_LOAD_ADDR=0x0
 CONFIG_SPL_OPENSBI_SCRATCH_OPTIONS=0x0
 CONFIG_DISPLAY_CPUINFO=y