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

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.

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: I9c7af9a4f75216ed2c6b44458d121a352bef4b95

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