V4L/DVB (6492): tuner: improve tuner_foo printk macros consistency

Alter the tuner_foo printk macros to indicate which module is
generating the message.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index b92efe0..17c873c 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -30,6 +30,8 @@
 
 #define UNSET (-1U)
 
+#define PREFIX "tuner "
+
 /* standard i2c insmod options */
 static unsigned short normal_i2c[] = {
 #if defined(CONFIG_TUNER_TEA5761) || (defined(CONFIG_TUNER_TEA5761_MODULE) && defined(MODULE))