[media] gspca: Use current logging styles

Add pr_fmt.
Convert usb style logging macros to pr_<level>.
Remove now unused old usb style logging macros.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/mars.c b/drivers/media/video/gspca/mars.c
index 0196209..ef45fa5 100644
--- a/drivers/media/video/gspca/mars.c
+++ b/drivers/media/video/gspca/mars.c
@@ -19,6 +19,8 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #define MODULE_NAME "mars"
 
 #include "gspca.h"
@@ -178,8 +180,8 @@
 			&alen,
 			500);	/* timeout in milliseconds */
 	if (ret < 0) {
-		err("reg write [%02x] error %d",
-			gspca_dev->usb_buf[0], ret);
+		pr_err("reg write [%02x] error %d\n",
+		       gspca_dev->usb_buf[0], ret);
 		gspca_dev->usb_err = ret;
 	}
 }