sound: soc: tegra-alt: Use ARCH_TEGRA_210_SOC

sound: soc: tegra-alt: Use ARCH_TEGRA_210_SOC

Make use of ARCH_TEGRA_210_SOC instead of ARCH_TEGRA_21x_SOC
so that we can get rid of redundant ARCH_TEGRA_21x_SOC.

ARCH_TEGRA_210_SOC aligns to up-stream as well.

Bug 1766370

Change-Id: I10a9d9bb63b1fbac358d85a228710a208d595281
Signed-off-by: Ishan Mittal <imittal@nvidia.com>
Reviewed-on: http://git-master/r/1306757
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>