ASoC: Intel: avs: Simplify d0ix disabling routine

No need to atomic_add_return(1) when there is atomic_inc_return()
available.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20221010121955.718168-9-cezary.rojewski@intel.com


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