cosmetic: aspeed: ast2500: Rename board file

Rename the ast2500-board.c to board_common.c and
place the renamed file under the ast2500 folder.

Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com>
diff --git a/arch/arm/mach-aspeed/ast2500/Makefile b/arch/arm/mach-aspeed/ast2500/Makefile
index 2e9e15d..4c27c8f 100644
--- a/arch/arm/mach-aspeed/ast2500/Makefile
+++ b/arch/arm/mach-aspeed/ast2500/Makefile
@@ -1,2 +1,3 @@
 obj-y += lowlevel_init.o
+obj-y += board_common.o
 obj-y += clk_ast2500.o sdram_ast2500.o
diff --git a/arch/arm/mach-aspeed/ast2500/board_common.c b/arch/arm/mach-aspeed/ast2500/board_common.c
new file mode 100644
index 0000000..3482ee9
--- /dev/null
+++ b/arch/arm/mach-aspeed/ast2500/board_common.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2016 Google, Inc
+ */
+#include <common.h>
+#include <dm.h>
+#include <init.h>
+#include <log.h>
+#include <ram.h>
+#include <timer.h>
+#include <asm/io.h>
+#include <asm/arch/timer.h>
+#include <asm/arch/wdt.h>
+#include <linux/err.h>
+#include <dm/uclass.h>
+
+/*
+ * Second Watchdog Timer by default is configured
+ * to trigger secondary boot source.
+ */
+#define AST_2ND_BOOT_WDT		1
+
+/*
+ * Third Watchdog Timer by default is configured
+ * to toggle Flash address mode switch before reset.
+ */
+#define AST_FLASH_ADDR_DETECT_WDT	2
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	struct udevice *dev;
+	struct ram_info ram;
+	int ret;
+
+	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (ret) {
+		debug("DRAM FAIL1\r\n");
+		return ret;
+	}
+
+	ret = ram_get_info(dev, &ram);
+	if (ret) {
+		debug("DRAM FAIL2\r\n");
+		return ret;
+	}
+
+	gd->ram_size = ram.size;
+
+	return 0;
+}