ASoC: Intel: avs: Allow i2s test and non-test boards to coexist

The i2s_test card serves debug purpose and is not probed by default.
Currently i2s_test and non-i2s_test sound cards exclude each other. To
increase the test coverage, allow both board types to be probed
simultaneously and share the available SSP port pool.

As 'i2s_test' module parameter is empty by default and requires manual
input from user to activate, there is no impact for standard production
scenarios.

Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Message-ID: <20250827142229.869139-6-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>