Clock direction is marked as 'unsigned int' but only two values are
currently used in practice. Note these down in the documentation.
Signed-off-by: John Watts <contact@jookia.org>
Link: https://msgid.link/r/20240326-dai_mclk_hint-v1-1-653cbd2d78d9@jookia.orgSigned-off-by: Mark Brown <broonie@kernel.org>