armv8: ls1088ardb: Add support for LS1088ARDB platform

LS1088A is an ARMv8 implementation. The LS1088ARDB is an evaluatoin
platform that supports the LS1088A family SoCs. This patch add basic
support of the platform.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Raghav Dogra <raghav.dogra@nxp.com>
Signed-off-by: Shaohui Xie <Shaohui.Xie@nxp.com>
[YS: Disabled NAND in board header file]
Reviewed-by: York Sun <york.sun@nxp.com>

WIP: disable NAND for LS1088ARDB
diff --git a/board/freescale/ls1088a/ddr.h b/board/freescale/ls1088a/ddr.h
new file mode 100644
index 0000000..dfcfc1f
--- /dev/null
+++ b/board/freescale/ls1088a/ddr.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __LS1088A_DDR_H__
+#define __LS1088A_DDR_H__
+struct board_specific_parameters {
+	u32 n_ranks;
+	u32 datarate_mhz_high;
+	u32 rank_gb;
+	u32 clk_adjust;
+	u32 wrlvl_start;
+	u32 wrlvl_ctl_2;
+	u32 wrlvl_ctl_3;
+};
+
+/*
+ * These tables contain all valid speeds we want to override with board
+ * specific parameters. datarate_mhz_high values need to be in ascending order
+ * for each n_ranks group.
+ */
+
+static const struct board_specific_parameters udimm0[] = {
+	/*
+	 * memory controller 0
+	 *   num|  hi| rank|  clk| wrlvl |   wrlvl   |  wrlvl
+	 * ranks| mhz| GB  |adjst| start |   ctl2    |  ctl3
+	 */
+#if defined(CONFIG_TARGET_LS1088ARDB)
+
+	{2,  1666, 0, 8,     8, 0x090A0B0E, 0x0F10110D,},
+	{2,  1900, 0, 4,     7, 0x09090B0D, 0x0E10120B,},
+	{2,  2300, 0, 8,     9, 0x0A0C0E11, 0x1214160F,},
+	{}
+
+#endif
+};
+
+static const struct board_specific_parameters *udimms[] = {
+	udimm0,
+};
+#endif