Add three additional page fault settings.

V2: move reg offset definition to header file. (Alex)
V3: add all shift/mask definitions of used reg. (Hawking)
Signed-off-by: Chengming Gui <Jack.Gui@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>