drm/meson: fix shutdown crash when component not probed
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 v4.14.235 by commit b4298d33c1fcce511ffe84d8d3de07e220300f9b, it was introduced in version v4.14.226 by commit 8a5160cc8488776ddc48ea045860dab015f47390. For more details please see the references link.