ASoC: sunxi: Use {regmap/regmap_field}_{set/clear}_bits helpers

Appropriately change calls to {regmap/regmap_field}_update_bits()
with {regmap/regmap_field}_set_bits()
and {regmap/regmap_field}_clear_bits() for improved readability.

Signed-off-by: Li Chen <lchen@ambarella.com>
Link: https://lore.kernel.org/r/180eef50e96.cb7c34db60740.8898768158778553647@zohomail.com


Signed-off-by: Mark Brown <broonie@kernel.org>