ASoC: atmel: one fix and few cleanups

Merge series from Claudiu Beznea <claudiu.beznea@microchip.com>:

The series adds one fix for mchp-spdifrx and few cleanups for
mchp-spdifrx and mchp-spdifrx drivers.

diff --cc sound/soc/atmel/mchp-spdifrx.c
Simple merge

diff --cc sound/soc/atmel/mchp-spdiftx.c
Simple merge