ARM: rmobile: alt: Synchronize defconfig

Synchronize the R8A7794 Alt defconfig, enable DM SPI, DM SPI FLASH
and I2C driver support.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/configs/alt_defconfig b/configs/alt_defconfig
index c4ece79..5e5467f 100644
--- a/configs/alt_defconfig
+++ b/configs/alt_defconfig
@@ -57,12 +57,14 @@
 CONFIG_DM_GPIO=y
 CONFIG_RCAR_GPIO=y
 CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_RCAR_I2C=y
 CONFIG_SYS_I2C_RCAR_IIC=y
 CONFIG_DM_MMC=y
 CONFIG_SH_MMCIF=y
 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
@@ -80,6 +82,7 @@
 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