ASoC: Intel: catpt: Code cleanup

Cezary Rojewski <cezary.rojewski@intel.com> says:

All of the changes found here are cleanups and from functional
perspective, have no impact - either unused code is being removed or
existing code is altered to use helpers/macros to improve readability.

Collateral of recent fixes [1].  There is one more patchset with similar
goal following this one.  Before the team managed to actually fix the
problem, a number of changes were added to make the code easier to
understand for people who are not the author (me).

[1]: https://lore.kernel.org/linux-sound/20260528083444.1439233-1-cezary.rojewski@intel.com/

Link: https://patch.msgid.link/20260603085827.1964796-1-cezary.rojewski@intel.com