ARM: rmobile: Update E2 Silk

The E2 Silk port was broken since some time. This patch updates
the E2 Silk port to use modern frameworks, DM, DT probing, SPL
for the preloading and puts it on par with the M2 Porter board.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
---
NOTE: The port is missing support for I2C1 for DA9063 reset, since the
      I2C driver needs to be converted to DM and DT probing. That's not
      an issue for this patch though, since the reset was broken on Silk
      since forever.
diff --git a/configs/silk_defconfig b/configs/silk_defconfig
index 5538186..309935d 100644
--- a/configs/silk_defconfig
+++ b/configs/silk_defconfig
@@ -1,17 +1,37 @@
 CONFIG_ARM=y
+CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_RMOBILE=y
-CONFIG_SYS_TEXT_BASE=0xE6304000
-CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_SYS_TEXT_BASE=0x50000000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_R8A7794=y
 CONFIG_TARGET_SILK=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_SPI_FLASH_SUPPORT=y
+CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_SPL=y
 CONFIG_DEFAULT_DEVICE_TREE="r8a7794-silk-u-boot"
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x2000
+CONFIG_FIT=y
 CONFIG_BOOTDELAY=3
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_BOARD_INIT=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_RAM_SUPPORT=y
+CONFIG_SPL_RAM_DEVICE=y
+CONFIG_SPL_SPI_LOAD=y
+CONFIG_SPL_YMODEM_SUPPORT=y
+CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMI is not set
 # CONFIG_CMD_XIMG is not set
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_PCI=y
 CONFIG_CMD_SDRAM=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
@@ -19,22 +39,43 @@
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_CLK=y
+CONFIG_CLK_RENESAS=y
+CONFIG_DM_GPIO=y
+CONFIG_RCAR_GPIO=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_RCAR_IIC=y
+CONFIG_DM_MMC=y
 CONFIG_SH_MMCIF=y
+CONFIG_RENESAS_SDHI=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_PHY_MICREL=y
-CONFIG_NETDEVICES=y
+CONFIG_DM_ETH=y
 CONFIG_SH_ETHER=y
-CONFIG_BAUDRATE=38400
+CONFIG_PCI=y
+CONFIG_DM_PCI=y
+CONFIG_PCI_RCAR_GEN2=y
+CONFIG_PINCTRL=y
+CONFIG_PINCONF=y
+CONFIG_PINCTRL_PFC=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SCIF_CONSOLE=y
 CONFIG_SH_QSPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_PCI=y
 CONFIG_USB_STORAGE=y