imx: mx8m: add soc related settings and files

Add SoC level initialization code
 - arch_cpu_init
 - mmu table
 - detect cpu revision
 - reset cpu and wdog settings
 - timer init
 - wdog settings
 - lowlevel init to save/restore registers
 - a few dummy header file to avoid build failure
 - ft_system_setup

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/arch/arm/include/asm/arch-mx8m/sys_proto.h b/arch/arm/include/asm/arch-mx8m/sys_proto.h
new file mode 100644
index 0000000..8bf9ac6
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx8m/sys_proto.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2017 NXP
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ARCH_MX8M_SYS_PROTO_H
+#define __ARCH_MX8M_SYS_PROTO_H
+
+#include <asm/mach-imx/sys_proto.h>
+
+void set_wdog_reset(struct wdog_regs *wdog);
+void enable_tzc380(void);
+void restore_boot_params(void);
+extern unsigned long rom_pointer[];
+enum boot_device get_boot_device(void);
+bool is_usb_boot(void);
+#endif