ASoC: da732x: Remove leftover cache size setting

The da732x driver no longer uses the ASoC level register cache but the
cache size setting had been left in the driver by mistake. Remove it.
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/da732x.c

@@ -1538,7 +1538,6 @@ static struct snd_soc_codec_driver soc_codec_dev_da732x = {
 	.dapm_routes		= da732x_dapm_routes,
 	.num_dapm_routes	= ARRAY_SIZE(da732x_dapm_routes),
 	.set_pll		= da732x_set_dai_pll,
-	.reg_cache_size		= ARRAY_SIZE(da732x_reg_cache),
 };
 
 static int da732x_i2c_probe(struct i2c_client *i2c,