x86: put get_kernel_rpl in a common location

This macro is useful for both i386 and x86_64, so put it in a common
location, where both arches can grab it.
Signed-off-by: NGlauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

include/asm-x86/segment.h

+#ifndef _ASM_X86_SEGMENT_H_
+#define _ASM_X86_SEGMENT_H_
+
 #ifdef CONFIG_X86_32
 # include "segment_32.h"
 #else
 # include "segment_64.h"
 #endif
+
+#ifndef CONFIG_PARAVIRT
+#define get_kernel_rpl()  0
+#endif
+
+#endif

include/asm-x86/segment_32.h

@@ -129,9 +129,6 @@
 #define SEGMENT_LDT		0x4
 #define SEGMENT_GDT		0x0
 
-#ifndef CONFIG_PARAVIRT
-#define get_kernel_rpl()  0
-#endif
 /*
  * Matching rules for certain types of segments.
  */