linuxkpi: Update ww_mutex_trylock() API for Linux 5.16
It gains new struct ww_acquire_ctx * argument we don't use currently.
Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D38568
(cherry picked from commit e6f7fe74a903b4085d60b0054ff75ee677beaf76)