ASoC: amd: fixed kernel warnings

This patch will fix unused variables kernel warnings when
CONFIG_ACPI is disabled.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/1594147044-25582-1-git-send-email-Vijendar.Mukunda@amd.com


Signed-off-by: Mark Brown <broonie@kernel.org>