regulator: Don't warn if we failed to get a regulator

The consumer can print a message if required, some consumers may have
optional regulators and wish to downgrade the logging for them or ignore
their absence.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

drivers/regulator/core.c

@@ -1031,8 +1031,6 @@ struct regulator *regulator_get(struct device *dev, const char *id)
 			goto found;
 		}
 	}
-	printk(KERN_ERR "regulator: Unable to get requested regulator: %s\n",
-	       id);
 	mutex_unlock(&regulator_list_mutex);
 	return regulator;