[PATCH] nvidiafb backlight: Fix implicit declaration in nv_backlight

drivers/video/nvidia/nv_backlight.c: In function 'nvidia_bl_init':
drivers/video/nvidia/nv_backlight.c:103: error: implicit declaration of function 'pmac_has_backlight_type'

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Cc: James Simmons <jsimmons@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/nvidia/nv_backlight.c

@@ -12,6 +12,11 @@
 #include <linux/backlight.h>
 #include <linux/fb.h>
 #include <linux/pci.h>
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+#include <asm/backlight.h>
+#endif
+
 #include "nv_local.h"
 #include "nv_type.h"
 #include "nv_proto.h"