linuxkpi: Implement the wait_event_interruptible macro

This is needed by the drm-kmod 5.5 update and is similar in logic to the
existing wait_event_killable macro.

Reviewed by: hselasky, manu
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D29987

(cherry picked from commit 057f145aae9a3528ccd722c8f566d740d5cafcbb)