Add detection for AMD Radeon Pro 5000-class GPUs.

This CL also cleans up detection for existing GPUs slightly, by
verifying that GPU model numbers are composed of digits instead of
allowing arbitrary characters.

Bug: skia:10256
Change-Id: I1416a24ac34edbe56e317e75f416c80d001d4ba4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/291046
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2 files changed