Blackfin: convert simple headers to asm-generic

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/include/asm/pgalloc.h b/arch/blackfin/include/asm/pgalloc.h
index c686e05..f261cb7 100644
--- a/arch/blackfin/include/asm/pgalloc.h
+++ b/arch/blackfin/include/asm/pgalloc.h
@@ -1,8 +1 @@
-#ifndef _BLACKFIN_PGALLOC_H
-#define _BLACKFIN_PGALLOC_H
-
-#include <asm/setup.h>
-
-#define check_pgt_cache()	do { } while (0)
-
-#endif				/* _BLACKFIN_PGALLOC_H */
+#include <asm-generic/pgalloc.h>