drm: move the fb bpp/depth helper into the core.

This is used by nearly everyone including vmwgfx which doesn't generally
use the fb helper.

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 21c2c56..171c441 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -247,7 +247,7 @@
 	u32 bpp, depth;
 	int ret;
 
-	drm_helper_get_fb_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
+	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 
 	if (mode_cmd->pitches[0] & 63)
 		return -EINVAL;