ASoC: es8328: Use single R/W for regmap

The chip only supports single reads and writes.
Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/es8328.c

@@ -713,6 +713,7 @@ const struct regmap_config es8328_regmap_config = {
 	.val_bits	= 8,
 	.max_register	= ES8328_REG_MAX,
 	.cache_type	= REGCACHE_RBTREE,
+	.use_single_rw	= true,
 };
 EXPORT_SYMBOL_GPL(es8328_regmap_config);