ASoC: msm: qdsp6v2: Set ADM sample rate to 48Khz for ULL

ULL copp can only operate at sample rate of 48Khz. BT SCO back end
sets sample rate is 8Khz. ADM open for  ULL fails when backend is
BT SCO. Set the sample rate to 48Khz when adm is opened for a ULL
device session.

CRs-Fixed: 545401, 545397
Change-Id: I18f18466324eebf2a2c8884b6e531155707996f4
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>