Bug 1798360: Once again allow WebRender on Wayland R600 devices with new-enough drivers. r=aosmond

Upstream driver fixes noted in
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17822 imply
that the root cause has been fixed. Bug 1673939 has been closed and it's
not clear we should keep these drivers on the blacklist.

Differential Revision: https://phabricator.services.mozilla.com/D169789

widget/gtk/GfxInfo.cpp

@@ -689,7 +689,7 @@ const nsTArray<GfxDriverInfo>& GfxInfo::GetGfxDriverInfo() {
         OperatingSystem::Linux, ScreenSizeStatus::All, BatteryStatus::All,
         WindowProtocol::All, DriverVendor::MesaAll, DeviceFamily::AmdR600,
         nsIGfxInfo::FEATURE_WEBRENDER, nsIGfxInfo::FEATURE_BLOCKED_DEVICE,
-        DRIVER_COMPARISON_IGNORED, V(0, 0, 0, 0),
+        DRIVER_LESS_THAN, V(22, 2, 0, 0),
         "FEATURE_FAILURE_WEBRENDER_BUG_1673939",
         "https://gitlab.freedesktop.org/mesa/mesa/-/issues/3720");