ASoC: amd: vangogh: Make use of DRV_NAME

The "acp5x_mach" string is provided for both driver name and
MODULE_ALIAS. Since they need to match, ensure DRV_NAME macro is used in
both locations.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20230705214800.193244-2-cristian.ciocaltea@collabora.com


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