[media] saa7134: prepare to use pr_foo macros

Add a pr_fmt macro, and move saa7134.h header to the beginning,
to avoid warnings when using the pr_foo macros.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/saa7134/saa7134-i2c.c

@@ -20,14 +20,15 @@
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include "saa7134.h"
+#include "saa7134-reg.h"
+
 #include <linux/init.h>
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
 
-#include "saa7134-reg.h"
-#include "saa7134.h"
 #include <media/v4l2-common.h>
 
 /* ----------------------------------------------------------- */