ARM: dts: msm: Configure en_few/rest wait values for MDSS gdsc on SDM845

With default values of EN_FEW_WAIT & EN_REST_WAIT the acks could
prematurely assert to the GDSC FSM and thus cause the FSM sequence to
complete prior to headswitch chain completion. Increase the value of
EN_FEW_WAIT and EN_REST_WAIT to 6 and 5 respectively.

CRs-Fixed: 2249415
Change-Id: I8052b3e6b3946c35cef7240c25bd646d42566d46
Signed-off-by: Amit Nischal <anischal@codeaurora.org>