disp: msm: dp: execute host_init on restoring session teardown

Ensure host_init is executed when the DP display driver is resuming
form a video session teardown. The host_deinit is executed when DP
video session teardown is initiated by the userspace while DP cable
is connected. If the DP display is disconnected from dongle while
the video session is in teardown, the host_init is not executed
when the session is restored. All subsequent display connections
will fail because the core clocks are not on and aux abort is not
reset.

This change will ensure host_init is executed whenever the
host_deinit is executed during DP video session teardown by userspace.

Change-Id: If1ae3eb731a96bd929cd023733c098b513436a1c
Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org>