board: mediatek: Add support for UniElec U7623 board

This is an MT7623A-based board, very similar to the Banana Pi R2.

http://www.unielecinc.com/q/news/cn/p/product/detail.html?qd_guid=OjXwKCaRlN

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/configs/mt7623a_unielec_u7623_02_defconfig b/configs/mt7623a_unielec_u7623_02_defconfig
new file mode 100644
index 0000000..72b5f31
--- /dev/null
+++ b/configs/mt7623a_unielec_u7623_02_defconfig
@@ -0,0 +1,54 @@
+CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
+CONFIG_ARCH_MEDIATEK=y
+CONFIG_SYS_TEXT_BASE=0x81e00000
+CONFIG_SYS_MALLOC_F_LEN=0x4000
+CONFIG_ENV_SIZE=0x1000
+CONFIG_ENV_OFFSET=0x100000
+CONFIG_TARGET_MT7623=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_BOOTDELAY=3
+CONFIG_SYS_CONSOLE_IS_IN_ENV=y
+CONFIG_DEFAULT_FDT_FILE="mt7623a-unielec-u7623-02-emmc.dtb"
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_SYS_PROMPT="U-Boot> "
+CONFIG_CMD_BOOTMENU=y
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_READ=y
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NFS is not set
+CONFIG_DEFAULT_DEVICE_TREE="mt7623a-unielec-u7623-02-emmc"
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
+CONFIG_CLK=y
+CONFIG_DM_MMC=y
+# CONFIG_MMC_QUIRKS is not set
+CONFIG_SUPPORT_EMMC_BOOT=y
+CONFIG_MMC_HS400_SUPPORT=y
+CONFIG_MMC_MTK=y
+CONFIG_PHY_FIXED=y
+CONFIG_DM_ETH=y
+CONFIG_MEDIATEK_ETH=y
+CONFIG_PINCTRL=y
+CONFIG_PINCONF=y
+CONFIG_PINCTRL_MT7623=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_MTK_POWER_DOMAIN=y
+CONFIG_DM_SERIAL=y
+CONFIG_MTK_SERIAL=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_WATCHDOG=y
+CONFIG_TIMER=y
+CONFIG_MTK_TIMER=y
+CONFIG_WDT_MTK=y
+CONFIG_LZMA=y