ASoC: amd: acp: Use pcim_iomap_region() in acp-pci

Convert acp-pci to the pcim-managed PCI life-cycle. Replace
pci_enable_device() with pcim_enable_device() and fold the
open-coded pci_request_regions() + devm_ioremap() pair into a single
pcim_iomap_region() call for BAR0, which reserves and iomaps the
register window.

This lets the driver drop the manual pci_release_regions() and
pci_disable_device() calls from the probe error path; pcim releases
the device and region automatically on detach or probe failure. The
error check moves from a NULL test to IS_ERR(), since pcim_iomap_region()
returns an IOMEM_ERR_PTR on failure.

The child platform devices only use devm_ioremap() on their sub-range
of BAR0 (no request_mem_region), so reserving the full BAR0 here does
not conflict with them.

Assisted-by: opencode:hy3-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260720001054.1439409-1-rosenp@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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