Add support for using system cache for SFE WMs and RMs
in case of sHDR use-cases for power saving. Also add
debugfs capability to control this feature.
CRs-Fixed: 2841729
Change-Id: Ic4dad50e8c396705b33bb0bc8330d25e51ca79a2
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>