drm: Make passing of format info to drm_helper_mode_fill_fb_struct() mandatory

Now that everyone passes along the format info to
drm_helper_mode_fill_fb_struct() we can make this behaviour
mandatory and drop the extra lookup.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250701090722.13645-20-ville.syrjala@linux.intel.com

Author: vsyrjala

drivers/gpu/drm/drm_modeset_helper.c

@@ -88,8 +88,7 @@ void drm_helper_mode_fill_fb_struct(struct drm_device *dev,
 	int i;
 
 	fb->dev = dev;
-	fb->format = info ? : drm_get_format_info(dev, mode_cmd->pixel_format,
-						  mode_cmd->modifier[0]);
+	fb->format = info;
 	fb->width = mode_cmd->width;
 	fb->height = mode_cmd->height;
 	for (i = 0; i < 4; i++) {