pvr: Extend hard coding infra to allow per stage per device coding.

pvr: Extend hard coding infra to allow per stage per device coding.

This commit extends the graphics hard coding infrastructure to
allow the independent hard coding of stages, i.e. hard code fragment
stage and vertex stage separately instead of having to hard code
everything.

It also extends the infrastructure to allow per device hard coding.

Signed-off-by: Karmjit Mahil <Karmjit.Mahil@imgtec.com>
Reviewed-by: Rajnesh Kanwal <rajnesh.kanwal@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17106>