imx: Introduce a header for the imx cpu versions

Instead of duplicating the CPU definitions at mx5 and mx6 sys_proto.h header
files, introduce a common header to centralize such definitions.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>

arch/arm/include/asm/arch-imx/cpu.h

+/*
+ * (C) Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#define MXC_CPU_MX51		0x51
+#define MXC_CPU_MX53		0x53
+#define MXC_CPU_MX6SL		0x60
+#define MXC_CPU_MX6DL		0x61
+#define MXC_CPU_MX6SOLO		0x62
+#define MXC_CPU_MX6Q		0x63

arch/arm/include/asm/arch-mx5/sys_proto.h

@@ -8,12 +8,7 @@
 #ifndef _SYS_PROTO_H_
 #define _SYS_PROTO_H_
 
-#define MXC_CPU_MX51		0x51
-#define MXC_CPU_MX53		0x53
-#define MXC_CPU_MX6SL		0x60
-#define MXC_CPU_MX6DL		0x61
-#define MXC_CPU_MX6SOLO		0x62
-#define MXC_CPU_MX6Q		0x63
+#include "../arch-imx/cpu.h"
 
 #define is_soc_rev(rev)	((get_cpu_rev() & 0xFF) - rev)
 u32 get_cpu_rev(void);

arch/arm/include/asm/arch-mx6/sys_proto.h

@@ -9,13 +9,7 @@
 #define _SYS_PROTO_H_
 
 #include <asm/imx-common/regs-common.h>
-
-#define MXC_CPU_MX51		0x51
-#define MXC_CPU_MX53		0x53
-#define MXC_CPU_MX6SL		0x60
-#define MXC_CPU_MX6DL		0x61
-#define MXC_CPU_MX6SOLO		0x62
-#define MXC_CPU_MX6Q		0x63
+#include "../arch-imx/cpu.h"
 
 #define is_soc_rev(rev)	((get_cpu_rev() & 0xFF) - rev)
 u32 get_cpu_rev(void);