ASoC: da7219: Update REFERENCES reg default, in-line with HW

In current AB silicon, BIAS_EN field is enabled by default in the
REFERENCES register, so the regmap default value should reflect
this.
Signed-off-by: NAdam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/da7219.c

@@ -1788,7 +1788,7 @@ static struct reg_default da7219_reg_defaults[] = {
 	{ DA7219_DIG_ROUTING_DAC, 0x32 },
 	{ DA7219_DAI_OFFSET_LOWER, 0x00 },
 	{ DA7219_DAI_OFFSET_UPPER, 0x00 },
-	{ DA7219_REFERENCES, 0x00 },
+	{ DA7219_REFERENCES, 0x08 },
 	{ DA7219_MIXIN_L_SELECT, 0x00 },
 	{ DA7219_MIXIN_L_GAIN, 0x03 },
 	{ DA7219_ADC_L_GAIN, 0x6F },