[Intel-gfx] [igt-dev] [PATCH i-g-t 1/2] tests/kms_frontbuffer_tracking: Fix build warning

[Chris Wilson]

Quoting Tvrtko Ursulin (2018-02-28 10:07:59)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Mark drrs_set as static to avoid a build warning.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris