compositor-drm: Refactor connector name into new function

Refactor the code constructing the connector name into a new function.
This makes create_output_for_connector() slightly easier to read.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
1 file changed