gallium/radeon: use explicit drm_major, drm_minor check
gallium/radeon: use explicit drm_major, drm_minor check

Just like everywhere else in the radeon codebase.

v2: Don't forget about drm_major == 3 (Alex)

Cc: Alex Deucher <08dc22c6156113f2deff178e35e3ed9b24d6af9e@amd.com>
Signed-off-by: Emil Velikov <4c996f2f093ddd0585a556460b4cc3ba555546ef@gmail.com>
Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler