dtt, lm81: move unneccessary printf into a debug printf

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/hwmon/lm81.c b/drivers/hwmon/lm81.c
index 668ee9f..afe5b0d 100644
--- a/drivers/hwmon/lm81.c
+++ b/drivers/hwmon/lm81.c
@@ -109,7 +109,7 @@
 	if (adr < 0)
 		return 1;
 
-	printf ("DTT:   Found LM81@%x Rev: %d\n", adr, rev);
+	debug ("DTT:   Found LM81@%x Rev: %d\n", adr, rev);
 	return 0;
 } /* _dtt_init() */