mfd: syscon: Move diagnostic messages to dev_dbg()

This patch moves diagnostic messages used for debugging purposes
to dev_dbg().

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 71841f9..2620056 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -152,7 +152,7 @@
 
 	platform_set_drvdata(pdev, syscon);
 
-	dev_info(dev, "regmap %pR registered\n", res);
+	dev_dbg(dev, "regmap %pR registered\n", res);
 
 	return 0;
 }