ALSA: ctxfi - Add prefix to debug prints

Added ctxfi: prefix to each debug print.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ctxfi/ctmixer.c b/sound/pci/ctxfi/ctmixer.c
index c80d692..b795076 100644
--- a/sound/pci/ctxfi/ctmixer.c
+++ b/sound/pci/ctxfi/ctmixer.c
@@ -760,7 +760,7 @@
 	for (i = 0; i < (NUM_CT_SUMS * CHN_NUM); i++) {
 		err = sum_mgr->get_sum(sum_mgr, &sum_desc, &sum);
 		if (err) {
-			printk(KERN_ERR "Failed to get sum resources for "
+			printk(KERN_ERR "ctxfi:Failed to get sum resources for "
 					  "front output!\n");
 			break;
 		}
@@ -775,8 +775,8 @@
 	for (i = 0; i < (NUM_CT_AMIXERS * CHN_NUM); i++) {
 		err = amixer_mgr->get_amixer(amixer_mgr, &am_desc, &amixer);
 		if (err) {
-			printk(KERN_ERR "Failed to get amixer resources for "
-					  "mixer obj!\n");
+			printk(KERN_ERR "ctxfi:Failed to get amixer resources "
+			       "for mixer obj!\n");
 			break;
 		}
 		mixer->amixers[i] = amixer;