OMAPFB: Check in suspend/resume if framebuffer device is initialized.

Check wether fbdev is NULL in suspend / resume functions. Fbdev is
NULL, if there is no lcd or it is not enabled in configuration.
Signed-off-by: Jouni Högander <jouni.hogander@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/video/omap/omapfb_main.c

@@ -1839,8 +1839,8 @@ static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
 {
 	struct omapfb_device *fbdev = platform_get_drvdata(pdev);
 
-	omapfb_blank(VESA_POWERDOWN, fbdev->fb_info[0]);
-
+	if (fbdev != NULL)
+		omapfb_blank(VESA_POWERDOWN, fbdev->fb_info[0]);
 	return 0;
 }
 
@@ -1849,7 +1849,8 @@ static int omapfb_resume(struct platform_device *pdev)
 {
 	struct omapfb_device *fbdev = platform_get_drvdata(pdev);
 
-	omapfb_blank(VESA_NO_BLANKING, fbdev->fb_info[0]);
+	if (fbdev != NULL)
+		omapfb_blank(VESA_NO_BLANKING, fbdev->fb_info[0]);
 	return 0;
 }