ASoC: amd: vg: remove warnings and errors pointed out by checkpatch pl

Fix checkpatch pl errors and warnings in vangogh machine driver.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20220225193054.24916-3-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>