ARM: MediaTek: add basic support for MT8512 boards

This adds a general board file based on MT8512 SoCs from MediaTek.

Apart from the generic parts (cpu) we add some low level init codes
and initialize the early clocks.

This commit is adding the basic boot support for the MT8512 eMMC board.

Signed-off-by: mingming lee <mingming.lee@mediatek.com>

board/mediatek/mt8512/Kconfig

@@ -0,0 +1,14 @@
+if TARGET_MT8512
+
+config SYS_BOARD
+	default "mt8512"
+
+config SYS_CONFIG_NAME
+	default "mt8512"
+
+
+config MTK_BROM_HEADER_INFO
+	string
+	default "media=nor"
+
+endif

board/mediatek/mt8512/MAINTAINERS

@@ -0,0 +1,6 @@
+MT8512
+M:	Mingming lee <mingming.lee@mediatek.com>
+S:	Maintained
+F:	board/mediatek/mt8512
+F:	include/configs/mt8512.h
+F:	configs/mt8512_bm1_emmc_defconfig

board/mediatek/mt8512/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += mt8512.o

board/mediatek/mt8512/mt8512.c

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <wdt.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = gd->ram_base + 0x100;
+
+	debug("gd->fdt_blob is %p\n", gd->fdt_blob);
+	return 0;
+}