msm: mdss: hdmi: Proper reauth abort

Properly abort reauthentication to avoid HDCP module going into
bad state and work queue deadlock.

CRs-Fixed: 614803
Change-Id: Iaf9d8d110fd1929394f0a77cfc732f1a5d5c3ba3
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>