regulator: core: Change dummy supplies error message to a warning

Change "dummy supplies not allowed" error message to warning instead, as this
is a just warning message with no change to the behavior.

[Added a CC to stable since some other bug fixes cause this to come up
more frequently on PCs which is how it was noticed -- broonie]

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b38a6b6..74e9fb2 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1352,7 +1352,7 @@
 		goto found;
 	/* Don't log an error when called from regulator_get_optional() */
 	} else if (!have_full_constraints() || exclusive) {
-		dev_err(dev, "dummy supplies not allowed\n");
+		dev_warn(dev, "dummy supplies not allowed\n");
 	}
 
 	mutex_unlock(&regulator_list_mutex);