arm: MediaTek: add basic support for MT7623 boards

This adds a general board file based on MT7623 SoCs from MediaTek.

As this u-boot is loaded by MTK proprietary preloader, there is no
low level initializtion codes.

Tested-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/mediatek/mt7623/Kconfig b/board/mediatek/mt7623/Kconfig
new file mode 100644
index 0000000..a8c670e
--- /dev/null
+++ b/board/mediatek/mt7623/Kconfig
@@ -0,0 +1,13 @@
+if TARGET_MT7623
+
+config SYS_BOARD
+	default "mt7623"
+
+config SYS_CONFIG_NAME
+	default "mt7623"
+
+config MTK_BROM_HEADER_INFO
+	string
+	default "lk=1"
+
+endif
diff --git a/board/mediatek/mt7623/MAINTAINERS b/board/mediatek/mt7623/MAINTAINERS
new file mode 100644
index 0000000..eeb0375
--- /dev/null
+++ b/board/mediatek/mt7623/MAINTAINERS
@@ -0,0 +1,7 @@
+MT7623
+M:	Ryder Lee <ryder.lee@mediatek.com>
+M:	Weijie Gao <weijie.gao@mediatek.com>
+S:	Maintained
+F:	board/mediatek/mt7623
+F:	include/configs/mt7623.h
+F:	configs/mt7623n_bpir2_defconfig
diff --git a/board/mediatek/mt7623/Makefile b/board/mediatek/mt7623/Makefile
new file mode 100644
index 0000000..2b42071
--- /dev/null
+++ b/board/mediatek/mt7623/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += mt7623_rfb.o
diff --git a/board/mediatek/mt7623/mt7623_rfb.c b/board/mediatek/mt7623/mt7623_rfb.c
new file mode 100644
index 0000000..08468b5
--- /dev/null
+++ b/board/mediatek/mt7623/mt7623_rfb.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 MediaTek Inc.
+ */
+
+#include <common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+	return 0;
+}