asm-generic/system.h: drop useless __KERNEL__

This header isn't exported to user-space, and even if it was, the
__KERNEL__ check covers the entire file, so we'd get a useless stub in the
first place.  So punt it.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

include/asm-generic/system.h

@@ -14,7 +14,6 @@
 #ifndef __ASM_GENERIC_SYSTEM_H
 #define __ASM_GENERIC_SYSTEM_H
 
-#ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 
 #include <linux/types.h>
@@ -139,5 +138,4 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
 
 #endif /* !__ASSEMBLY__ */
 
-#endif /* __KERNEL__ */
 #endif /* __ASM_GENERIC_SYSTEM_H */