sh_mobile_meram: Safely disable MERAM operation when not initialized

If the MERAM platform data is defined, but the MERAM has not been
properly initaliazed we need to safely fall back to non-MERAM operation.
Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

drivers/video/sh_mobile_lcdcfb.c

@@ -610,7 +610,8 @@ static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 		pitch = ch->info->fix.line_length;
 
 		/* test if we can enable meram */
-		if (ch->cfg.meram_cfg && priv->meram_dev) {
+		if (ch->cfg.meram_cfg && priv->meram_dev &&
+				priv->meram_dev->ops) {
 			struct sh_mobile_meram_cfg *cfg;
 			struct sh_mobile_meram_info *mdev;
 			unsigned long icb_addr_y, icb_addr_c;