msm: mdss: hdmi: check if hdcp2p2 app is present during hpd

Check if the hdcp2p2 app is present every time the hdmi cable
is connected. If the app is not present, then we consider
hdcp-2.2 as not supported on the target. This scenario occurs
on devices that are not hdcp-2.2 provisioned, and with this
change hdmi core continues in non-encrypted mode.

Change-Id: I72ebcc1e6844f46dbbc974efb6ba926948e1bbde
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>