disp: msm: sde: skip msm_lastclose if display is stuck in splash

This change skips msm_lastclose, when splash enabled builtin-displays
equals number of actual displays and are stuck in continuous splash.
It fixes the issue seen with change commit id 548b17185e95
("disp: msm: send power_on event in dual display composer kill scenario").

Change-Id: I1f5417d8945db621dc20ab0a9cc0146eabae5e22
Signed-off-by: Jayaprakash Madisetty <quic_jmadiset@quicinc.com>