When one of the MCLK pins is used to supply an internal clock directly
enable the source clock for that pin.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20191230143517.21005-1-ckeepax@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>