uboot-phytec

ARM: rmobile: Remove CONFIG_CMD_SDRAM from Salvator-X

This command is useless on Salvator-X as it is reading DRAM info from
SPD. We have no SPD on Salvator-X.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>