USB: dwc3-msm: Initialize DBM ep before BAM pipe reset

On new platforms, endpoint clock gating is added for dbm endpoints
with Synopsys USB3.0 controller. This hardware feature requires
initialization of DBM endpoint before BAM pipe reset for bam2bam mode
data transfers working. Hence change sequence such that do DBM endpoint
initialization first followed by BAM pipe reset and do start transfer
as last operation.

CRs-Fixed: 965207
Change-Id: Ib5bfd1a7d258fe336a4c9924850fc9223c1c81f6
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>