egl: check for driver_configs in dri2_display_release

With later commits we'll split and reuse the destroy side of the
function for the initialize_foo error path.

In such cases, driver_configs may be NULL leading to a crash.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
[Emil Velikov: reword commit message]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Tested-by: Rob Herring <robh@kernel.org>
1 file changed