ASoC: Intel: catpt: Drop redundant enum constant

CATPT_SSP_IFACE_LAST is being used only to calculate CATPT_SSP_COUNT.
Make CATPT_SSP_COUNT part of the enum directly and remove the redundant
constant.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220403141647.1037173-1-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: Intel: catpt: Implement IPC protocol

Implement IRQ handlers for immediate and delayed replies and
notifications. Communication is synchronous and allows for serialization
of maximum one message at a time.

DSP may respond with ADSP_PENDING status for a request - known as
delayed reply - and when situation occurs, framework keeps the lock and
awaits upcoming response through IPCD channel which is handled in
bottom-half. Immediate replies spawn no BH at all as their processing is
very short.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200929141247.8058-3-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>