msm: mdss: handoff programmable fetch from bootloader to kernel

During transition from bootloader to kernel, make sure programmable
fetch trigger enable status is properly transitioned so that prefill BW
can be effectively calculated.

Change-Id: I30d2827b1b8158799601050560ec41e338855790
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>