fb: for framebuffer handover don't exit the loop early.

An offb machine has been seen in the fields which adds two
offb nodes, so continue scanning the list after removing one.

Signed-off-by: Dave Airlie <[e-mail]>

drivers/video/fbmem.c

···
 				       fb_info->fix.id,
 				       registered_fb[i]->fix.id);
 				unregister_framebuffer(registered_fb[i]);
-				break;
 			}
 		}
 	}