ASoC: amd: ps: update license

To align with AMD SoundWire manager driver license, update license as
GPL-2.0-only for Pink Sardine ACP PCI driver and corresponding child
drivers.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://msgid.link/r/20240222102656.631144-1-Vijendar.Mukunda@amd.com


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