src/include: Add guards on all header files

Change-Id: I2d7d4e0b25f2cf3eef2040f89d5ebc711909cdd7
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20734
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

src/include/cpu/amd/model_10xxx_rev.h

@@ -13,8 +13,13 @@
  * GNU General Public License for more details.
  */
 
+#ifndef __CPU_AMD_MODEL_10XXX_REV_H__
+#define __CPU_AMD_MODEL_10XXX_REV_H__
+
 #include <arch/cpu.h>
 
 int init_processor_name(void);
 
 /* place holder for Family 10 revision code */
+
+#endif /* __CPU_AMD_MODEL_10XXX_REV_H__ */

src/include/cpu/amd/model_fxx_rev.h

@@ -1,3 +1,6 @@
+#ifndef __CPU_AMD_MODEL_FXX_REV_H__
+#define __CPU_AMD_MODEL_FXX_REV_H__
+
 #include <arch/cpu.h>
 #include <arch/io.h>
 
@@ -125,3 +128,4 @@ int is_e0_later_in_bsp(int nodeid);
 int is_cpu_f0_in_bsp(int nodeid);
 
 #endif
+#endif /* __CPU_AMD_MODEL_FXX_REV_H__ */

src/include/cpu/amd/sc520.h

@@ -1,4 +1,8 @@
+#ifndef __CPU_AMD_SC520_H__
+#define __CPU_AMD_SC520_H__
+
 /* handy dandy stuff for the sc520 MMCR */
+
 /* default location of the MMCR */
 #define MMCR 0xfffef000
 
@@ -309,3 +313,5 @@ struct mmcr {
 
 
 #define MMCRDEFAULT ((struct mmcr *) 0xfffef000)
+
+#endif /* __CPU_AMD_SC520_H__ */

src/include/cpu/x86/post_code.h

@@ -1,3 +1,5 @@
+#ifndef __X86_POST_CODE_H__
+#define __X86_POST_CODE_H__
 
 #include <console/post_codes.h>
 
@@ -10,3 +12,5 @@
 #else
 #define post_code(value)
 #endif
+
+#endif /* __X86_POST_CODE_H__ */