armv8/ls1043ardb: Add LS1043ARDB board support

LS1043ARDB Specification:
-------------------------
Memory subsystem:
 * 2GByte DDR4 SDRAM (32bit bus)
 * 128 Mbyte NOR flash single-chip memory
 * 512 Mbyte NAND flash
 * 16 Mbyte high-speed SPI flash
 * SD connector to interface with the SD memory card

Ethernet:
 * XFI 10G port
 * QSGMII with 4x 1G ports
 * Two RGMII ports

PCIe:
 * PCIe2 (Lanes C) to mini-PCIe slot
 * PCIe3 (Lanes D) to PCIe slot

USB 3.0: two super speed USB 3.0 type A ports

UART: supports two UARTs up to 115200 bps for console

Signed-off-by: Hou Zhiqiang <B48286@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
diff --git a/board/freescale/ls1043ardb/README b/board/freescale/ls1043ardb/README
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+Overview
+--------
+The LS1043A Reference Design Board (RDB) is a high-performance computing,
+evaluation, and development platform that supports the QorIQ LS1043A
+LayerScape Architecture processor. The LS1043ARDB provides SW development
+platform for the Freescale LS1043A processor series, with a complete
+debugging environment. The LS1043A RDB is lead-free and RoHS-compliant.
+
+LS1043A SoC Overview
+--------------------
+The LS1043A integrated multicore processor combines four ARM Cortex-A53
+processor cores with datapath acceleration optimized for L2/3 packet
+processing, single pass security offload and robust traffic management
+and quality of service.
+
+The LS1043A SoC includes the following function and features:
+ - Four 64-bit ARM Cortex-A53 CPUs
+ - 1 MB unified L2 Cache
+ - One 32-bit DDR3L/DDR4 SDRAM memory controllers with ECC and interleaving
+   support
+ - Data Path Acceleration Architecture (DPAA) incorporating acceleration the
+   the following functions:
+   - Packet parsing, classification, and distribution (FMan)
+   - Queue management for scheduling, packet sequencing, and congestion
+     management (QMan)
+   - Hardware buffer management for buffer allocation and de-allocation (BMan)
+   - Cryptography acceleration (SEC)
+ - Ethernet interfaces by FMan
+   - Up to 1 x XFI supporting 10G interface
+   - Up to 1 x QSGMII
+   - Up to 4 x SGMII supporting 1000Mbps
+   - Up to 2 x SGMII supporting 2500Mbps
+   - Up to 2 x RGMII supporting 1000Mbps
+ - High-speed peripheral interfaces
+   - Three PCIe 2.0 controllers, one supporting x4 operation
+   - One serial ATA (SATA 3.0) controllers
+ - Additional peripheral interfaces
+   - Three high-speed USB 3.0 controllers with integrated PHY
+   - Enhanced secure digital host controller (eSDXC/eMMC)
+   - Quad Serial Peripheral Interface (QSPI) Controller
+   - Serial peripheral interface (SPI) controller
+   - Four I2C controllers
+   - Two DUARTs
+   - Integrated flash controller supporting NAND and NOR flash
+ - QorIQ platform's trust architecture 2.1
+
+ LS1043ARDB board Overview
+ -----------------------
+ - SERDES Connections, 4 lanes supporting:
+      - PCI Express 2.0 with two PCIe connectors supporting: miniPCIe card and
+        standard PCIe card
+      - QSGMII with x4 RJ45 connector
+      - XFI with x1 RJ45 connector
+ - DDR Controller
+     - 2GB 32bits DDR4 SDRAM. Support rates of up to 1600MT/s
+ -IFC/Local Bus
+    - One 128MB NOR flash 16-bit data bus
+    - One 512 MB NAND flash with ECC support
+    - CPLD connection
+ - USB 3.0
+    - Two super speed USB 3.0 Type A ports
+ - SDHC: connects directly to a full SD/MMC slot
+ - DSPI: 16 MB high-speed flash Memory for boot code and storage (up to 108MHz)
+ - 4 I2C controllers
+ - UART
+   - Two 4-pin serial ports at up to 115.2 Kbit/s
+   - Two DB9 D-Type connectors supporting one Serial port each
+ - ARM JTAG support
+
+Memory map from core's view
+----------------------------
+Start Address	End Address	Description		Size
+0x00_0000_0000	0x00_000F_FFFF	Secure Boot ROM		1MB
+0x00_0100_0000	0x00_0FFF_FFFF	CCSRBAR			240MB
+0x00_1000_0000	0x00_1000_FFFF	OCRAM0			64KB
+0x00_1001_0000	0x00_1001_FFFF	OCRAM1			64KB
+0x00_2000_0000	0x00_20FF_FFFF	DCSR			16MB
+0x00_6000_0000	0x00_67FF_FFFF	IFC - NOR Flash		128MB
+0x00_7E80_0000	0x00_7E80_FFFF	IFC - NAND Flash	64KB
+0x00_7FB0_0000	0x00_7FB0_0FFF	IFC - FPGA		4KB
+0x00_8000_0000	0x00_FFFF_FFFF	DRAM1			2GB
+
+Booting Options
+---------------
+a) NOR boot