Blackfin: convert simple headers to asm-generic

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/include/asm/fb.h b/arch/blackfin/include/asm/fb.h
index c7df380..3a4988e 100644
--- a/arch/blackfin/include/asm/fb.h
+++ b/arch/blackfin/include/asm/fb.h
@@ -1,12 +1 @@
-#ifndef _ASM_FB_H_
-#define _ASM_FB_H_
-#include <linux/fb.h>
-
-#define fb_pgprotect(...) do {} while (0)
-
-static inline int fb_is_primary_device(struct fb_info *info)
-{
-	return 0;
-}
-
-#endif /* _ASM_FB_H_ */
+#include <asm-generic/fb.h>