drm/gma500: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops

This refactoring leads to real functional changes in the driver.

Now the struct psbfb_ops implements two additional members:

       .fb_setcmap     = drm_fb_helper_setcmap,
       .fb_pan_display = drm_fb_helper_pan_display,

and the struct psbfb_roll_ops implements one additional member:

       .fb_setcmap     = drm_fb_helper_setcmap,

and the struct psbfb_unaccel_ops implements two additional members:

       .fb_setcmap     = drm_fb_helper_setcmap,
       .fb_pan_display = drm_fb_helper_pan_display,

These changes are not tested.

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Stefan Christ <contact@stefanchrist.eu>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1479078208-25221-19-git-send-email-contact@stefanchrist.eu

drivers/gpu/drm/gma500/framebuffer.c

@@ -185,9 +185,7 @@ static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 
 static struct fb_ops psbfb_ops = {
 	.owner = THIS_MODULE,
-	.fb_check_var = drm_fb_helper_check_var,
-	.fb_set_par = drm_fb_helper_set_par,
-	.fb_blank = drm_fb_helper_blank,
+	DRM_FB_HELPER_DEFAULT_OPS,
 	.fb_setcolreg = psbfb_setcolreg,
 	.fb_fillrect = drm_fb_helper_cfb_fillrect,
 	.fb_copyarea = psbfb_copyarea,
@@ -198,9 +196,7 @@ static struct fb_ops psbfb_ops = {
 
 static struct fb_ops psbfb_roll_ops = {
 	.owner = THIS_MODULE,
-	.fb_check_var = drm_fb_helper_check_var,
-	.fb_set_par = drm_fb_helper_set_par,
-	.fb_blank = drm_fb_helper_blank,
+	DRM_FB_HELPER_DEFAULT_OPS,
 	.fb_setcolreg = psbfb_setcolreg,
 	.fb_fillrect = drm_fb_helper_cfb_fillrect,
 	.fb_copyarea = drm_fb_helper_cfb_copyarea,
@@ -211,9 +207,7 @@ static struct fb_ops psbfb_roll_ops = {
 
 static struct fb_ops psbfb_unaccel_ops = {
 	.owner = THIS_MODULE,
-	.fb_check_var = drm_fb_helper_check_var,
-	.fb_set_par = drm_fb_helper_set_par,
-	.fb_blank = drm_fb_helper_blank,
+	DRM_FB_HELPER_DEFAULT_OPS,
 	.fb_setcolreg = psbfb_setcolreg,
 	.fb_fillrect = drm_fb_helper_cfb_fillrect,
 	.fb_copyarea = drm_fb_helper_cfb_copyarea,