drm/msm/dp: fix link setup

Keep the link clocks on in case of abort to avoid unnecessary
un-clocked register access. The clocks are eventually powered
off after abort.

CRs-Fixed: 2393144d
Change-Id: I6356e29901f36933eaf0952e784a173a8eefe0db
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>