pvr: Split pvr_dev_addr_t into a separate header
This type is useful beyond the scope of winsys.
It can now be used without being lumbered with a dependency on pvr_winsys.h. Since pvr_winsys.h is used by pvr_private.h, this can be a common cause for circular dependencies during development.
Also included in this MR are a hopefully unobjectionable subset of the macros added in !17203. These account for 90% of the use cases and it would be great to get them merged while discusson on the other MR continues.
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Reviewed-by: Karmjit Mahil <Karmjit.Mahil@imgtec.com>