Drop 'S' from end of SND_SOC_TOPOLOGY_KUNIT_TESTS inorder to adhear to
 the KUNIT *_KUNIT_TEST config name format.
Signed-off-by: Nico Pache <npache@redhat.com>
Link: https://lore.kernel.org/r/dcf79e592f9a7e14483dde32ac561f6af2632e50.1618388989.git.npache@redhat.comSigned-off-by: Mark Brown <broonie@kernel.org>