northbridge/intel: Do not define include guard as 1

As `#ifndef` and not `#if` is used in the check for
include guards, setting it to 1 is not needed.

Change-Id: Iaa6c0f807b9e99ad3c9551abe4ab1627e5505d67
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/8103
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Tested-by: build bot (Jenkins)

src/northbridge/intel/haswell/haswell.h

@@ -19,7 +19,7 @@
  */
 
 #ifndef __NORTHBRIDGE_INTEL_HASWELL_HASWELL_H__
-#define __NORTHBRIDGE_INTEL_HASWELL_HASWELL_H__ 1
+#define __NORTHBRIDGE_INTEL_HASWELL_HASWELL_H__
 
 /* Chipset types */
 #define HASWELL_MOBILE	0
@@ -233,4 +233,4 @@ int init_igd_opregion(igd_opregion_t *igd_opregion);
 
 #endif
 #endif
-#endif
+#endif /* __NORTHBRIDGE_INTEL_HASWELL_HASWELL_H__ */