regulator: mc13xxx: Remove unused field "hi_bit"

Field "hi_bit" is not used anywhere in the driver.
This patch removes this excess field.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/regulator/mc13xxx.h

@@ -21,7 +21,6 @@ struct mc13xxx_regulator {
 	int vsel_reg;
 	int vsel_shift;
 	int vsel_mask;
-	int hi_bit;
 };
 
 struct mc13xxx_regulator_priv {