disp: msm: dp: wait for resources init in case of cont splash

Driver probe has to wait for dp resource initialization,
in case of continuous splash to avoid any resource resets.

Change-Id: Idaa506b14132d22b9bfe558c88ab6d33171b4f3b
Signed-off-by: Nilesh Laad <quic_nlaad@quicinc.com>