x86: merge some trivially mergeable headers

Merge errno.h, resource.h, rtc.h, sections.h, serial.h and sockios.h,
where i386 and x86_64 have no or only trivial comment/include guard
differences.

Build tested on both 32-bit and 64-bit, and booted on 64-bit.

[tglx: fixup Kbuild as well]

Signed-off-by: Roland Dreier <roland@digitalvampire.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/sockios.h b/include/asm-x86/sockios.h
index 5a134fc..49cc72b 100644
--- a/include/asm-x86/sockios.h
+++ b/include/asm-x86/sockios.h
@@ -1,13 +1,13 @@
-#ifdef __KERNEL__
-# ifdef CONFIG_X86_32
-#  include "sockios_32.h"
-# else
-#  include "sockios_64.h"
-# endif
-#else
-# ifdef __i386__
-#  include "sockios_32.h"
-# else
-#  include "sockios_64.h"
-# endif
-#endif
+#ifndef _ASM_X86_SOCKIOS_H
+#define _ASM_X86_SOCKIOS_H
+
+/* Socket-level I/O control calls. */
+#define FIOSETOWN	0x8901
+#define SIOCSPGRP	0x8902
+#define FIOGETOWN	0x8903
+#define SIOCGPGRP	0x8904
+#define SIOCATMARK	0x8905
+#define SIOCGSTAMP	0x8906		/* Get stamp (timeval) */
+#define SIOCGSTAMPNS	0x8907		/* Get stamp (timespec) */
+
+#endif /* _ASM_X86_SOCKIOS_H */