reset: add reset controller driver for MediaTek MIPS platform

This patch adds reset controller driver for MediaTek MIPS platform and
header file for mt7628.

diff --git a/include/dt-bindings/reset/mt7628-reset.h b/include/dt-bindings/reset/mt7628-reset.h
new file mode 100644
index 0000000..2a674c1
--- /dev/null
+++ b/include/dt-bindings/reset/mt7628-reset.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author:  Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#ifndef _DT_BINDINGS_MT7628_RESET_H_
+#define _DT_BINDINGS_MT7628_RESET_H_
+
+#define MT7628_PWM_RST			31
+#define MT7628_SDXC_RST			30
+#define MT7628_CRYPTO_RST		29
+#define MT7628_AUX_STCK_RST		28
+#define MT7628_PCIE_RST			26
+#define MT7628_EPHY_RST			24
+#define MT7628_ETH_RST			23
+#define MT7628_UPHY_RST			22
+#define MT7628_UART2_RST		20
+#define MT7628_UART1_RST		19
+#define MT7628_SPI_RST			18
+#define MT7628_I2S_RST			17
+#define MT7628_I2C_RST			16
+#define MT7628_GDMA_RST			14
+#define MT7628_PIO_RST			13
+#define MT7628_UART0_RST		12
+#define MT7628_PCM_RST			11
+#define MT7628_MC_RST			10
+#define MT7628_INT_RST			9
+#define MT7628_TIMER_RST		8
+#define MT7628_HIF_RST			5
+#define MT7628_WIFI_RST			4
+#define MT7628_SPIS_RST			3
+#define MT7628_SYS_RST			0
+
+#endif /* _DT_BINDINGS_MT7628_RESET_H_ */