drm/gma500: Convert to generic gamma funcs

This takes care of the remaining chips using the old generic code.
We don't check if the pipe number is valid but the old code peeked in
the register map before checking anyways so just ignore it.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
diff --git a/drivers/gpu/drm/gma500/mdfld_intel_display.c b/drivers/gpu/drm/gma500/mdfld_intel_display.c
index da83fdd..2862cdb 100644
--- a/drivers/gpu/drm/gma500/mdfld_intel_display.c
+++ b/drivers/gpu/drm/gma500/mdfld_intel_display.c
@@ -436,7 +436,7 @@
 			}
 		}
 
-		psb_intel_crtc_load_lut(crtc);
+		gma_crtc_load_lut(crtc);
 
 		/* Give the overlay scaler a chance to enable
 		   if it's on this pipe */