regulator: ab8500: Fix voltage_mask for AB8505_LDO_AUDIO

The voltage_mask and voltage_shift settings of AB8505_LDO_AUDIO are not matched.
It looks like a typo in the voltage_mask settings.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/ab8500.c

@@ -1130,7 +1130,7 @@ static struct ab8500_regulator_info
 		.update_val		= 0x02,
 		.voltage_bank		= 0x01,
 		.voltage_reg		= 0x57,
-		.voltage_mask		= 0x7,
+		.voltage_mask		= 0x70,
 		.voltage_shift		= 4,
 	},
 	[AB8505_LDO_ANAMIC1] = {