Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h

Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h as all arch
files that #include the former also #include the latter.  See:

	grep -rl asm-generic/cmpxchg-local[.]h arch/ | sort > b
	grep -rl asm-generic/cmpxchg[.]h arch/ | sort > a
	comm a b

This simplifies the disintegration of asm-generic/system.h for arches that
don't have their own.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/include/asm-generic/cmpxchg.h b/include/asm-generic/cmpxchg.h
index 213ac6e..e0449af 100644
--- a/include/asm-generic/cmpxchg.h
+++ b/include/asm-generic/cmpxchg.h
@@ -10,6 +10,8 @@
 #error "Cannot use generic cmpxchg on SMP"
 #endif
 
+#include <asm-generic/cmpxchg-local.h>
+
 /*
  * Atomic compare and exchange.
  *