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 v4.19.193 by commit e256a0eb43e17209e347409a80805b1659398d68, it was introduced in version v4.19.181 by commit 8fbbf2b3849419e31731902d7478b0c934732632. For more details please see the references link.