ARM: rmobile: salvator-x: Add SD support

Add support for the SD card slots on the Salvator-X board.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/configs/salvator-x_defconfig b/configs/salvator-x_defconfig
index 8cef607..1478b6a 100644
--- a/configs/salvator-x_defconfig
+++ b/configs/salvator-x_defconfig
@@ -8,9 +8,11 @@
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_FDT=y
 CONFIG_R8A7795=y
-# CONFIG_CMD_IMI is not set
+CONFIG_SH_SDHI=y
 # CONFIG_CMD_IMLS is not set
-# CONFIG_CMD_XIMG is not set
+CONFIG_CMD_EDITENV=y
+CONFIG_CMD_SAVEENV=y
 CONFIG_DOS_PARTITION=y
-# CONFIG_MMC is not set
+CONFIG_MMC=y
+CONFIG_GENERIC_MMC=y
 CONFIG_OF_LIBFDT=y