ARM: imx: Convert mccmon6 to use DM/DTS in the u-boot proper

This commit converts mccmon6's u-boot proper (in a single commit to avoid
build breaks) to use solely DM/DTS.

The DTS description of the mccmon6 has been ported from Linux kernel
(v4.20, SHA1: 8fe28cb58bcb235034b64cbbb7550a8a43fd88be)

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/configs/mccmon6_sd_defconfig b/configs/mccmon6_sd_defconfig
index 377c52a..031a413 100644
--- a/configs/mccmon6_sd_defconfig
+++ b/configs/mccmon6_sd_defconfig
@@ -11,25 +11,37 @@
 # CONFIG_CMD_BMODE is not set
 CONFIG_SPL_TEXT_BASE=0x00908000
 CONFIG_DISTRO_DEFAULTS=y
+CONFIG_FIT=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/liebherr/mccmon6/mon6_imximage_sd.cfg"
 # CONFIG_USE_BOOTCOMMAND is not set
 CONFIG_BOUNCE_BUFFER=y
 CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_ENV_SUPPORT=y
 CONFIG_SPL_NOR_SUPPORT=y
+CONFIG_CMD_CLK=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_CACHE=y
+CONFIG_CMD_PMIC=y
+CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_MTDPARTS=y
 CONFIG_MTDIDS_DEFAULT="nor0=8000000.nor"
 CONFIG_MTDPARTS_DEFAULT="mtdparts=8000000.nor:32m@0x0(mccmon6-image.nor),256k@0x40000(u-boot-env.nor),1m@0x80000(u-boot.nor),8m@0x180000(kernel.nor),8m@0x980000(swupdate-kernel.nor),8m@0x1180000(swupdate-rootfs.nor),128k@0x1980000(kernel-dtb.nor),128k@0x19C0000(swupdate-kernel-dtb.nor)"
+CONFIG_OF_CONTROL=y
+CONFIG_DEFAULT_DEVICE_TREE="imx6q-mccmon6"
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_DM=y
 CONFIG_FSL_USDHC=y
+CONFIG_I2C_SET_DEFAULT_BUS_NUM=y
+CONFIG_SYS_I2C_MXC=y
+CONFIG_SYS_I2C_MXC_I2C1=y
+CONFIG_SYS_I2C_MXC_I2C2=y
+CONFIG_DM_MMC=y
 CONFIG_MTD=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_MTD_DEVICE=y
@@ -38,16 +50,28 @@
 CONFIG_FLASH_CFI_MTD=y
 CONFIG_SYS_FLASH_PROTECTION=y
 CONFIG_SYS_FLASH_CFI=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
-CONFIG_SF_DEFAULT_BUS=2
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=25000000
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ90X1=y
+CONFIG_FEC_MXC=y
+CONFIG_RGMII=y
 CONFIG_MII=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX6=y
+CONFIG_DM_PMIC=y
+# CONFIG_SPL_PMIC_CHILDREN is not set
+CONFIG_DM_PMIC_PFUZE100=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_PFUZE100=y
+# CONFIG_REQUIRE_SERIAL_CONSOLE is not set
+# CONFIG_SPL_SERIAL_PRESENT is not set
+# CONFIG_TPL_SERIAL_PRESENT is not set
+CONFIG_MXC_UART=y
 CONFIG_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_DM_THERMAL=y
-CONFIG_OF_LIBFDT=y