regulator: tps65910: Add regulator info for RTC rail

Adding missing regulator info for VRTC rail for device
tps65911. The regulator voltage rail index start from
VRTC which is defined as 0.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/tps65910-regulator.c

@@ -174,6 +174,9 @@ static struct tps_info tps65910_regs[] = {
 };
 
 static struct tps_info tps65911_regs[] = {
+	{
+		.name = "VRTC",
+	},
 	{
 		.name = "VIO",
 		.min_uV = 1500000,