graphics/mesa*: Update to 21.3.7

While here add panfrost driver for arm64 and enable
lavapipe (llvm based driver for vulkan).

Realese notes: https://lists.freedesktop.org/archives/mesa-dev/2022-February/225692.html
MFC: 2022Q1
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D34366
Differential Revision: https://reviews.freebsd.org/D34370
Differential Revision: https://reviews.freebsd.org/D34371

(cherry picked from commit 4ddf9ef51bfdbe55613a0f249d390094a3369177)