ARM: imx: pico-imx8mq: Add support for Technexion Pico-iMX8MQ

Add initial support for Technexion Pico-iMX8MQ SoM on PicoPI carrier
board. Currently working is ethernet, serial, eMMC. DT is imported
from Linux 5.4.28 ("462afcd6e7ea") .

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: "NXP i.MX U-Boot Team" <uboot-imx@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
diff --git a/configs/pico-imx8mq_defconfig b/configs/pico-imx8mq_defconfig
new file mode 100644
index 0000000..2d68fe1
--- /dev/null
+++ b/configs/pico-imx8mq_defconfig
@@ -0,0 +1,47 @@
+CONFIG_ARM=y
+CONFIG_ARCH_IMX8M=y
+CONFIG_SYS_TEXT_BASE=0x40200000
+CONFIG_ENV_SIZE=0x1000
+CONFIG_ENV_OFFSET=0x400000
+CONFIG_DM_GPIO=y
+CONFIG_TARGET_PICO_IMX8MQ=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL=y
+CONFIG_CSF_SIZE=0x2000
+CONFIG_SPL_TEXT_BASE=0x7E1000
+CONFIG_FIT=y
+CONFIG_FIT_EXTERNAL_OFFSET=0x3000
+CONFIG_SPL_LOAD_FIT=y
+CONFIG_SPL_FIT_GENERATOR="arch/arm/mach-imx/mkimage_fit_atf.sh"
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/imx8m/imximage.cfg"
+CONFIG_SPL_BOARD_INIT=y
+CONFIG_HUSH_PARSER=y
+# CONFIG_BOOTM_NETBSD is not set
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_OF_CONTROL=y
+CONFIG_DEFAULT_DEVICE_TREE="imx8mq-pico-pi"
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SAVED_DRAM_TIMING_BASE=0x40000000
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_MXC=y
+CONFIG_DM_MMC=y
+CONFIG_SUPPORT_EMMC_BOOT=y
+CONFIG_FSL_USDHC=y
+CONFIG_DM_ETH=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX8M=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_IMX8M_POWER_DOMAIN=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_DM_RESET=y
+CONFIG_DM_THERMAL=y