ASoC: cs42l42: Correct definition of CS42L42_ADC_PDN_MASK

The definition of CS42L42_ADC_PDN_MASK was incorrectly defined
as the HP_PDN bit.

Fixes: 2c394ca7 ("ASoC: Add support for CS42L42 codec")
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210616135604.19363-1-rf@opensource.cirrus.com


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