asoc: sm6150: Add support for audio over display port

Fix condition to register display port dai link as
part of soundcard registration.

CRs-Fixed: 2321275
Change-Id: I196163599299fa4aea21c930c0bfe3f8e5425223
Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>