ASoC: codecs: allow WM8961 to be selected by the user

Allow the WM8961 driver to be enabled independently now that it is
usable with devicetree.

Signed-off-by: Doug Brown <doug@schmorgal.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20221003032414.248326-4-doug@schmorgal.com


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