ARM: rmobile: Convert Gen2 Stout, Porter, Silk to DM_SPI{,_FLASH}

Enable DM_SPI and DM_SPI_FLASH in U-Boot on H2 Stout, M2W Porter and E3 Silk.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/configs/stout_defconfig b/configs/stout_defconfig
index 1c92cb6..552cf55 100644
--- a/configs/stout_defconfig
+++ b/configs/stout_defconfig
@@ -62,6 +62,7 @@
 CONFIG_RENESAS_SDHI=y
 CONFIG_MTD=y
 CONFIG_MTD_DEVICE=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_SPI_FLASH_MTD=y
@@ -79,6 +80,7 @@
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SCIF_CONSOLE=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_SH_QSPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y