ASoC: SOF: amd: add SoundWire PM ops for ACP7.B/7.F

Add handle_amd_sof_acp7x_sdw_pme_event() to iterate over all four
SoundWire managers on runtime PM resume, clear PME status and
wake-enable bits (under acp_lock to prevent races with the IRQ path),
and request runtime resume for each active manager.

Extend amd_sof_acp7x_suspend() with a clock-stop fast path: when
SoundWire managers are in clock-stop mode, write ZSC_DSP_CTRL=1 and
call acp_dsp_reset() instead of the full acp_reset() to preserve
SoundWire bus state. Extend amd_sof_acp7x_resume() with a matching
clock-stop resume path that restores ZSC_DSP_CTRL and re-arms PME_EN.

Introduce amd_sof_acp7x_suspend_runtime() and
amd_sof_acp7x_resume_runtime() as separate runtime PM callbacks.
The runtime resume path calls handle_amd_sof_acp7x_sdw_pme_event()
after re-initialising hardware to clear any PME state that arrived
during the suspend window.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://patch.msgid.link/20260910132251.1171943-12-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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