MLK-20940-3 codecs: cs42xx8: use single read/write to send i2c msg

cs42xx8 will call regcache_sync to refresh its register cache. However,
it will send a long msg which length is greater than the max buffer size
of virtual i2c driver. It will cause the regcache_sync operation failed.
So, use the single read/write to send i2c msg in regcache functions.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
(cherry picked from commit 0153e60c26a0fdcf463fb16b090511da7e52df0c)

sound/soc/codecs/cs42xx8.c

@@ -452,6 +452,7 @@ const struct regmap_config cs42xx8_regmap_config = {
 	.volatile_reg = cs42xx8_volatile_register,
 	.writeable_reg = cs42xx8_writeable_register,
 	.cache_type = REGCACHE_RBTREE,
+	.use_single_rw = true,
 };
 EXPORT_SYMBOL_GPL(cs42xx8_regmap_config);