drm/meson: Fix refcount bugs in mesonvpuhasavailableconnectors()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.291 by commit 6a758f0ba11699837af9e1a0f7cbac6ef765a23e, it was introduced in version v4.10 by commit bbbe775ec5b5dace43a35886da9924837da09ddd. For more details please see the references link.