Don't throw a warning if we are given an invalid property id. While here let's also bring back Robert' original idea of catching unhandled enumeration values at compile time. Fixes:eec688e142("drm/i915: Add i915 perf infrastructure") Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Robert Bragg <robert@sixbynine.org> Reviewed-by: Robert Bragg <robert@sixbynine.org> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170327203236.18276-1-matthew.auld@intel.com (cherry picked from commit0a309f9e3d) Signed-off-by: Jani Nikula <jani.nikula@intel.com>