utils/get-developers: use Developers.hasfile() where appropriate

Instead of open-coding Developers.hasfile() in utils/get-developers,
use it directly.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Tested-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
1 file changed