regulator: max8907: Properly set pmic pointer in max8907_regulator_remove()

Add missing platform_get_drvdata() call in max8907_regulator_remove(), this
fixes below build warning:

  CC [M]  drivers/regulator/max8907-regulator.o
drivers/regulator/max8907-regulator.c: In function 'max8907_regulator_remove':
drivers/regulator/max8907-regulator.c:353:23: warning: 'pmic' is used uninitialized in this function [-Wuninitialized]
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/max8907-regulator.c

@@ -347,7 +347,7 @@ static __devinit int max8907_regulator_probe(struct platform_device *pdev)
 
 static __devexit int max8907_regulator_remove(struct platform_device *pdev)
 {
-	struct max8907_regulator *pmic;
+	struct max8907_regulator *pmic = platform_get_drvdata(pdev);
 	int i;
 
 	for (i = 0; i < MAX8907_NUM_REGULATORS; i++)