CHROMIUM: ASoC: samsung: don't configure smdk audio everywhere

CHROMIUM: ASoC: samsung: don't configure smdk audio everywhere

We want both drivers enabled so the same kernel can boot SMDK and
Daisy/Snow, but we can't have the SMDK driver registering itself on
hardware it doesn't exist on.

Change-Id: I5a446c1a840f539200b26e2f5aadf6b28d7fcb45
Signed-off-by: Olof Johansson <olofj@chromium.org>
Reviewed-on: https://gerrit-int.chromium.org/20547
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Commit-Ready: Olof Johansson <olofj@google.com>
Tested-by: Olof Johansson <olofj@google.com>