rockchip: Add basic support for evb-rv1108 board

Add basic support for rv1108 evb, whith this patch we
can boot into u-boot console.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/rockchip/evb_rv1108/evb_rv1108.c b/board/rockchip/evb_rv1108/evb_rv1108.c
new file mode 100644
index 0000000..fe37eac
--- /dev/null
+++ b/board/rockchip/evb_rv1108/evb_rv1108.c
@@ -0,0 +1,52 @@
+/*
+ * (C)Copyright 2016 Rockchip Electronics Co., Ltd
+ * Authors: Andy Yan <andy.yan@rock-chips.com>
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <fdtdec.h>
+#include <asm/arch/grf_rv1108.h>
+#include <asm/arch/hardware.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int mach_cpu_init(void)
+{
+	int node;
+	struct rv1108_grf *grf;
+
+	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "rockchip,rv1108-grf");
+	grf = (struct rv1108_grf *)fdtdec_get_addr(gd->fdt_blob, node, "reg");
+
+	/*evb board use UART2 m0 for debug*/
+	rk_clrsetreg(&grf->gpio2d_iomux,
+		     GPIO2D2_MASK | GPIO2D1_MASK,
+		     GPIO2D2_UART2_SOUT_M0 << GPIO2D2_SHIFT |
+		     GPIO2D1_UART2_SIN_M0 << GPIO2D1_SHIFT);
+	rk_clrreg(&grf->gpio3c_iomux, GPIO3C3_MASK | GPIO3C2_MASK);
+
+	return 0;
+}
+
+
+int board_init(void)
+{
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = 0x8000000;
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = 0x60000000;
+	gd->bd->bi_dram[0].size = 0x8000000;
+
+	return 0;
+}