mx3fb: Issue prettier log message

Without this patch we end up with a log message like
"mx3_sdc_fb mx3_sdc_fb: mx3fb: fb registered". That's two fb
too much for my taste.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
index 7a168ba..b7af525 100644
--- a/drivers/video/mx3fb.c
+++ b/drivers/video/mx3fb.c
@@ -1366,7 +1366,7 @@
 
 	mx3fb_blank(FB_BLANK_UNBLANK, fbi);
 
-	dev_info(dev, "mx3fb: fb registered, using mode %s\n", fb_mode);
+	dev_info(dev, "registered, using mode %s\n", fb_mode);
 
 	ret = register_framebuffer(fbi);
 	if (ret < 0)