imx6q-lxr: Add board support

Add support for the Comvetia i.MX6Q LXR2 board, which is
uses the Phytec PFLA02 SoM.

Based on the original work from Stefano Babic <sbabic@denx.de>.

The Phytec PFLA02 devicetrees are taken from kernel 6.11-rc7.

The imx6q-lxr.dts has been submitted upstream:

https://lore.kernel.org/linux-devicetree/20240913200906.1753458-3-festevam@gmail.com/

After it gets accepted in mainline (most likely in kernel 6.13),
the lxr2 board can then be switched to OF_UPSTREAM and these device trees
can be removed from U-Boot.

Signed-off-by: Fabio Estevam <festevam@denx.de>
diff --git a/configs/lxr2_defconfig b/configs/lxr2_defconfig
new file mode 100644
index 0000000..855366d
--- /dev/null
+++ b/configs/lxr2_defconfig
@@ -0,0 +1,118 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MX6=y
+CONFIG_TEXT_BASE=0x17800000
+CONFIG_SYS_MALLOC_LEN=0xa00000
+CONFIG_SYS_MALLOC_F_LEN=0x4000
+CONFIG_SPL_GPIO=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_SF_DEFAULT_SPEED=20000000
+CONFIG_ENV_SIZE=0x4000
+CONFIG_ENV_OFFSET=0x100000
+CONFIG_ENV_SECT_SIZE=0x10000
+CONFIG_MX6Q=y
+CONFIG_TARGET_LXR2=y
+CONFIG_DM_GPIO=y
+CONFIG_DEFAULT_DEVICE_TREE="imx6q-lxr"
+CONFIG_SPL_TEXT_BASE=0x00908000
+CONFIG_SYS_MONITOR_LEN=409600
+CONFIG_SPL_MMC=y
+CONFIG_SPL_SERIAL=y
+CONFIG_SYS_BOOTCOUNT_ADDR=0x020CC068
+CONFIG_SPL=y
+CONFIG_SYS_BOOTCOUNT_SINGLEWORD=y
+CONFIG_ENV_OFFSET_REDUND=0x110000
+CONFIG_SPL_LIBDISK_SUPPORT=y
+CONFIG_SPL_SPI_FLASH_SUPPORT=y
+CONFIG_SPL_SPI=y
+CONFIG_LTO=y
+CONFIG_HAS_BOARD_SIZE_LIMIT=y
+CONFIG_BOARD_SIZE_LIMIT=715766
+CONFIG_FIT=y
+CONFIG_SPL_FIT_PRINT=y
+CONFIG_SPL_LOAD_FIT=y
+CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_SYS_PBSIZE=532
+CONFIG_SYS_CONSOLE_IS_IN_ENV=y
+CONFIG_SPL_LEGACY_IMAGE_FORMAT=y
+CONFIG_SPL_SYS_MALLOC=y
+CONFIG_SPL_FIT_IMAGE_TINY=y
+CONFIG_SPL_SPI_LOAD=y
+CONFIG_SYS_SPI_U_BOOT_OFFS=0x11400
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=32
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_SPL=y
+CONFIG_CMD_SPL_WRITE_SIZE=0x20000
+CONFIG_CMD_MD5SUM=y
+CONFIG_MD5SUM_VERIFY=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_NAND_TRIMFFS=y
+CONFIG_CMD_PART=y
+CONFIG_CMD_WDT=y
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_BOOTCOUNT=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_CMD_MTDPARTS=y
+CONFIG_MTDIDS_DEFAULT="nand0=gpmi-nand"
+CONFIG_MTDPARTS_DEFAULT="mtdparts=gpmi-nand:40m(Kernels),860m(root),-(nand)"
+CONFIG_CMD_UBI=y
+# CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_EFI_PARTITION=y
+# CONFIG_SPL_EFI_PARTITION is not set
+CONFIG_OF_CONTROL=y
+CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_ARP_TIMEOUT=200
+CONFIG_BOUNCE_BUFFER=y
+CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_SYS_BOOTCOUNT_MAGIC=0xB0C4000
+CONFIG_SYS_BOOTCOUNT_BE=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_MXC=y
+CONFIG_FSL_USDHC=y
+CONFIG_MTD=y
+CONFIG_DM_MTD=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_NAND_MXS=y
+CONFIG_NAND_MXS_DT=y
+CONFIG_SYS_NAND_ONFI_DETECTION=y
+CONFIG_SYS_NAND_U_BOOT_LOCATIONS=y
+CONFIG_SYS_NAND_U_BOOT_OFFS=0xe00000
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SF_DEFAULT_BUS=2
+CONFIG_SPI_FLASH_SFDP_SUPPORT=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=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_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_DM_SERIAL=y
+CONFIG_MXC_UART=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_MXC_SPI=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_WATCHDOG=y
+CONFIG_SYSRESET_WATCHDOG_AUTO=y
+CONFIG_IMX_THERMAL=y