disp: msm: dp: do not abort DP display init if link is aborted

It is possible that by the time DP display is initialized by the
user mode in response to a hotplug connect event, the DP display has
already been disconnected. In such cases, the link aborted flag is
set by the driver prior to sending the HPD disconnect event. Current
implementation will abort the connection callback when this aborted
flag is set. As a result, the DP stream clocks would not be enabled
and the DP interface will not be able to generate any vsyncs. This can
cause a lot of instability. Allow the connection callbacks from the
usermode to complete successfully to avoid these issues. This will also
help in subsequent disconnect and connect notifications to be handled
gracefully.

CRs-Fixed: 2534560
Change-Id: I9a0d44492a3590e1b6026bc545ee81f7414925cd
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>