ASoC: alc5632: Added support of two undocumented registers

There are two undocumented registers in use in alc5632_i2c_probe
function. It must be added to support future rewrite of this
function to use regmap API completely.

Signed-off-by: Leon Romanovsky <leon@leon.nu>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/alc5632.c

@@ -104,6 +104,8 @@ static bool alc5632_volatile_register(struct device *dev,
 	case ALC5632_OVER_CURR_STATUS:
 	case ALC5632_HID_CTRL_DATA:
 	case ALC5632_EQ_CTRL:
+	case ALC5632_VENDOR_ID1:
+	case ALC5632_VENDOR_ID2:
 		return true;
 
 	default: