[Intel-xe] [PATCH v8 0/3] uAPI bits for small-bar

[Matthew Auld]

The remaining small-bar bits. Add support for requesting CPU access for VRAM
buffers. Also expose this to userspace, along with various bits of related
accounting. Finally turn on small-bar support.

IGT:  https://patchwork.freedesktop.org/series/115786/
Mesa: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23781

v2: Various improvements suggested by José
v3: Add some kernel-doc (Gwan-gyeong)
v4: Small kernel-doc fix, also use the correct version of the struct
v5: Rebase on latest xe-next changes
v6: Rebase on the needed PL_TT -> PL_TT move fix, plus fix some other issues
    reported by José when running actual workloads
v7: Rebase on latest xe-next changes
v8: Rebase and one kernel-doc warning fix

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2.41.0