ARM: rmobile: Enable MMC HS400 on Salvator-X, ULCB, Ebisu

Enable the HS400 support code on H3, M3W, M3N Salvator-X(S)
and ULCB boards as well as E3 Ebisu board.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/configs/r8a7796_salvator-x_defconfig b/configs/r8a7796_salvator-x_defconfig
index 7c39268..3525045 100644
--- a/configs/r8a7796_salvator-x_defconfig
+++ b/configs/r8a7796_salvator-x_defconfig
@@ -42,6 +42,7 @@
 CONFIG_MMC_IO_VOLTAGE=y
 CONFIG_MMC_UHS_SUPPORT=y
 CONFIG_MMC_HS200_SUPPORT=y
+CONFIG_MMC_HS400_SUPPORT=y
 CONFIG_RENESAS_SDHI=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ90X1=y