msm: mdss: recovery mode issue with JDI 5.5' panel

When continuous splash is on blank call from recovery
module returns early. But AFE/touch driver on getting
blank event can go ahead with disp enable and reset GPIO
toggling which will result in bad DSI state.
To fix this, expose an API from display to return continuous
splash flag.

Change-Id: I6ecc9b969fb74bddacb86277e24500b7f215fdd4
Signed-off-by: Vineet Bajaj <vbajaj@codeaurora.org>