regulator: Add WM1811 support

The WM1811 has a slightly different range on LDO2 to other WM8994 class
devices.

Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/wm8994-regulator.c

···
 		return (selector * 100000) + 900000;
 	case WM8958:
 		return (selector * 100000) + 1000000;
+	case WM1811:
+		switch (selector) {
+		case 0:
+			return -EINVAL;
+		default:
+			return (selector * 100000) + 950000;
+		}
+		break;
 	default:
 		return -EINVAL;
 	}
···
 		break;
 	case WM8958:
 		selector = (min_uV - 1000000) / 100000;
+		break;
+	case WM1811:
+		selector = (min_uV - 950000) / 100000;
+		if (selector == 0)
+			selector = 1;
 		break;
 	default:
 		return -EINVAL;