ARM: riotboard: Enable OF_CONTROL and DM gpio/pin control

Enable OF_CONTROL and DM for gpio and pin control support
on the i.MX6D based riotboard.
Signed-off-by: NPeter Robinson <pbrobinson@gmail.com>
Cc: "Eric Bénard" <eric@eukrea.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>

configs/riotboard_defconfig

@@ -5,10 +5,12 @@ CONFIG_SPL_GPIO_SUPPORT=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_NR_DRAM_BANKS=1
+CONFIG_DEFAULT_DEVICE_TREE="imx6dl-riotboard"
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_OFFSET=0x60000
 CONFIG_MX6S=y
 CONFIG_TARGET_EMBESTMX6BOARDS=y
+CONFIG_OF_CONTROL=y
 CONFIG_SPL_TEXT_BASE=0x00908000
 CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y
@@ -27,6 +29,7 @@ CONFIG_SPL_OS_BOOT=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+# CONFIG_CMD_PINMUX is not set
 CONFIG_CMD_SF=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_CACHE=y
@@ -36,9 +39,12 @@ CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SYS_MMC_ENV_DEV=2
 CONFIG_DM=y
+CONFIG_DM_GPIO=y
 CONFIG_BOUNCE_BUFFER=y
 CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_FSL_USDHC=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX6=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000