egl/dri: de-duplicate dri2_load_driver*

The difference between the three functions is the list of mandatory
driver extensions. Pass that as an argument to the common helper.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
1 file changed