ASoC: tegra: Fix wrong value type in MVC

The enum controls are expected to use enumerated value type.
Update relevant references in control get/put callbacks.

Fixes: e539891f ("ASoC: tegra: Add Tegra210 based MVC driver")
Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/1637219231-406-7-git-send-email-spujar@nvidia.com


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