regulator: Fix the argument of calling regulator_mode_constrain

The second parameter of regulator_mode_constrain takes a pointer.

This patch fixes below warning:
drivers/regulator/core.c: In function 'regulator_set_mode':
drivers/regulator/core.c:2014: warning: passing argument 2 of 'regulator_mode_constrain' makes pointer from integer without a cast
drivers/regulator/core.c:200: note: expected 'int *' but argument is of type 'unsigned int'

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@vega.(none)>

drivers/regulator/core.c

@@ -2011,7 +2011,7 @@ int regulator_set_mode(struct regulator *regulator, unsigned int mode)
 	}
 
 	/* constraints check */
-	ret = regulator_mode_constrain(rdev, mode);
+	ret = regulator_mode_constrain(rdev, &mode);
 	if (ret < 0)
 		goto out;