Support for NXP's imx SoC common function

This patch adds support for NXP's imx SoC common
function support like topology, gic implementation.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
diff --git a/plat/imx/common/include/plat_imx8.h b/plat/imx/common/include/plat_imx8.h
new file mode 100644
index 0000000..27d4c37
--- /dev/null
+++ b/plat/imx/common/include/plat_imx8.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __PLAT_IMX8_H__
+#define __PLAT_IMX8_H__
+
+#include <gicv3.h>
+
+unsigned int plat_calc_core_pos(uint64_t mpidr);
+void imx_mailbox_init(uintptr_t base_addr);
+void plat_gic_driver_init(void);
+void plat_gic_init(void);
+void plat_gic_cpuif_enable(void);
+void plat_gic_cpuif_disable(void);
+void plat_gic_pcpu_init(void);
+
+#endif /*__PLAT_IMX8_H__ */
diff --git a/plat/imx/common/include/plat_macros.S b/plat/imx/common/include/plat_macros.S
new file mode 100644
index 0000000..30cce0a
--- /dev/null
+++ b/plat/imx/common/include/plat_macros.S
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * the below macros print out relevant GIC
+ * registers whenever an unhandled exception is
+ * taken in BL3-1
+ */
+.macro plat_print_gic_regs
+	/* TODO */
+.endm
+
+/*
+ * the below macros print out relevant interconnect
+ * registers whenever an unhandled exception is
+ * taken in BL3-1
+ */
+.macro plat_print_interconnect_regs
+	/* TODO */
+.endm
+
+/* ---------------------------------------------
+ * The below required platform porting macro
+ * prints out relevant platform registers
+ * whenever an unhandled exception is taken in
+ * BL31.
+ * ---------------------------------------------
+ */
+.macro plat_crash_print_regs
+      /* TODO */
+.endm