feat(plat/mdeiatek/mt8192): add DFD control in SiP service

DFD (Design for Debug) is a debugging tool, which scans
flip-flops and dumps to internal RAM on the WDT reset.
After system reboots, those values could be showed for
debugging.

Change-Id: I9c7af9a4f75216ed2c6b44458d121a352bef4b95
6 files changed