linux-phytec-ti

ASoC: tas2552: Rename mclk parameter to pll_clkin to match with the datasheet

MCLK is one of the possible source for the pll_clkin frequency. Make this
clear by renaming the variable.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>