ASoC: amd: acp: Fix pointer assignments for snd_soc_acpi_mach structures

ASoC: amd: acp: Fix pointer assignments for snd_soc_acpi_mach structures

This patch modifies the assignment of machine structure pointers in the
acp_pci_probe function. Previously, the machine pointers were assigned
using the address-of operator (&), which caused incompatibility issues
in type assignments.

Additionally, the declarations of the machine arrays in amd.h have been
updated to reflect that they are indeed arrays (`[]`). The code is
further cleaned up by declaring the codec structures in
amd-acpi-mach.c as static, reflecting their intended usage.

error: symbol 'amp_rt1019' was not declared. Should it be static?
error: symbol 'amp_max' was not declared. Should it be static?
error: symbol 'snd_soc_acpi_amd_acp_machines' was not declared. Should it be static?
error: symbol 'snd_soc_acpi_amd_rmb_acp_machines' was not declared. Should it be static?
error: symbol 'snd_soc_acpi_amd_acp63_acp_machines' was not declared. Should it be static?
error: symbol 'snd_soc_acpi_amd_acp70_acp_machines' was not declared. Should it be static?

Fixes: 9c2c0ef64009 ("ASoC: amd: acp: Fix snd_soc_acpi_mach id's duplicate symbol error")

Link: https://github.com/thesofproject/linux/issues/5438
Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu@amd.com>
Link: https://patch.msgid.link/20250609121251.639080-1-venkataprasad.potturu@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>