frv: use generic fb.h

The arch uses a verbatim copy of the asm-generic version and does not
add any own implementations to the header, so use asm-generic/fb.h
instead of duplicating code.

Link: http://lkml.kernel.org/r/20170517083307.1697-1-tklauser@distanz.chSigned-off-by: NTobias Klauser <tklauser@distanz.ch>
Reviewed-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/frv/include/asm/Kbuild

@@ -3,6 +3,7 @@ generic-y += clkdev.h
 generic-y += device.h
 generic-y += exec.h
 generic-y += extable.h
+generic-y += fb.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += mm-arch-hooks.h

arch/frv/include/asm/fb.h

-#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_ */