ASoC: mchp-i2s-mcc: make signed 1 bit bitfields unsigned

The signed 1 bit bitfields should be unsigned, so make them unsigned.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20200325132913.110115-1-colin.king@canonical.com


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