regulator: arizona-ldo1: Add additional top voltage

The number of voltage slots supported by the LDO is 7, not 6.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index 36c1c5c..800c8ad 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -55,7 +55,7 @@
 	.bypass_mask = ARIZONA_LDO1_BYPASS,
 	.min_uV = 900000,
 	.uV_step = 50000,
-	.n_voltages = 6,
+	.n_voltages = 7,
 	.enable_time = 500,
 
 	.owner = THIS_MODULE,