[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 <[e-mail]>
Signed-off-by: Antonino Daplas <[e-mail]>
Cc: James Simmons <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/nvidia/nv_backlight.c

···
 #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"