armv8: ls1046ardb: Add LS1046ARDB board support

LS1046ARDB Specification:
-------------------------
Memory subsystem:
 * 8GByte DDR4 SDRAM (64bit bus)
 * 512 Mbyte NAND flash
 * Two 64 Mbyte high-speed SPI flash
 * SD connector to interface with the SD memory card
 * On-board 4G eMMC

Ethernet:
 * Two XFI 10G ports
 * Two SGMII ports
 * Two RGMII ports

PCIe:
 * PCIe1 (SerDes2 Lane0) to miniPCIe slot
 * PCIe2 (SerDes2 Lane1) to x2 PCIe slot
 * PCIe3 (SerDes2 Lane2) to x4 PCIe slot

SATA:
 * SerDes2 Lane3 to SATA port

USB 3.0: one super speed USB 3.0 type A port
	 one Micro-AB port

UART: supports two UARTs up to 115200 bps for console

Signed-off-by: Mingkai Hu <mingkai.hu@nxp.com>
Signed-off-by: Shaohui Xie <Shaohui.Xie@nxp.com>
Signed-off-by: Gong Qianyu <Qianyu.Gong@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/ls1046ardb/MAINTAINERS b/board/freescale/ls1046ardb/MAINTAINERS
new file mode 100644
index 0000000..ff42bef
--- /dev/null
+++ b/board/freescale/ls1046ardb/MAINTAINERS
@@ -0,0 +1,9 @@
+LS1046A BOARD
+M:	Mingkai Hu <mingkai.hu@nxp.com>
+S:	Maintained
+F:	board/freescale/ls1046ardb/
+F:	board/freescale/ls1046ardb/ls1046ardb.c
+F:	include/configs/ls1046ardb.h
+F:	configs/ls1046ardb_qspi_defconfig
+F:	configs/ls1046ardb_sdcard_defconfig
+F:	configs/ls1046ardb_emmc_defconfig