drivers: dai: intel: dmic: fix dmic power-up on cAVS2.5 and ACE1.5

The logic to poll on CPA bit is not working on non-ACE2.0
platforms. This is causing regressions in SOF test suite with
dmic.

Fixes: 25479485 ("intel_adsp: ace20_lnl: dmic: Program new HW registers for dmic")
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>