FW13 AMD random reboots

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This is related. Since the 7840HS and 7840U use the same chip.

Summary: Seem to stem from a error in the reference design for the 7040 series. Dell and Hp dont use the reference design and make their own thing, so they are not affected.

Also see

FW13 AMD Linux Random Shutdowns
Ryzen 5 7640U FW13 randomly reboots under GPU load
FW13 AMD Linux Random Shutdowns