video: mmpdisp: add spi port in display controller

Add spi port support in mmp display controller.  This port is from display
controller and for panel usage.  This driver implemented and registered as
a spi master.

Signed-off-by: Zhou Zhu <zzhu3@marvell.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Lisa Du <cldu@marvell.com>
Cc: Guoqing Li <ligq@marvell.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/mmp/hw/mmp_ctrl.c

@@ -535,6 +535,12 @@ static int mmphw_probe(struct platform_device *pdev)
 		}
 	}
 
+#ifdef CONFIG_MMP_DISP_SPI
+	ret = lcd_spi_register(ctrl);
+	if (ret < 0)
+		goto failed_path_init;
+#endif
+
 	dev_info(ctrl->dev, "device init done\n");
 
 	return 0;