drm/radeon: disable tests/benchmarks if accel is disabled
drm/radeon: disable tests/benchmarks if accel is disabled

From Alex Deucher
bce5a3c1bfa49fd373c28fc29bee89bf77fdc2db in ubuntu 3.8
4a1132a023eb48cf10522d84c5908d43b612c041 in mainline linux

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars