ASoC: tegra-alt: Add config for card registration

ASoC: tegra-alt: Add config for card registration

Registration of audio card was causing L4T sanity test
failures when audio codec was absent. Added a new kernel
config to selectively enable this feature.

Bug 200130213

Reviewed-on: http://git-master/r/783159
(cherry picked from commit 8adb770420239e57a2061c54dafae08ddaee7928)
Change-Id: I0998c122742e4012eda02a3d389fae96ee85202b
Signed-off-by: Sharad Gupta <sharadg@nvidia.com>
Signed-off-by: Asha T <atalambedu@nvidia.com>
Reviewed-on: http://git-master/r/789447
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>