ASoC: cs35l34: Add missing regmap use_single config

ASoC: cs35l34: Add missing regmap use_single config

This device requires single register transactions, this will
definely cause problems with the new device ID parsing which uses
regmap_bulk_read but might also show up in the cache sync sometimes.
Add the missing flags to the regmap_config.

Fixes: 8cb9b001635c ("ASoC: cs35l34: Minor error paths fixups")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210511175718.15416-3-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>