moused(8): Add command line option to restrict interface type

to evdev or sysmouse. It is required to avoid receiving of double events
on hybrid devices supporting both interfaces like ums (4).

MFC after: 1 day
Reviewed by: glebius (via private chat)
Differential Revision: https://reviews.freebsd.org/D52647

(cherry picked from commit 1335bf5ce1c9f0bf15c1fbed502f49e5a4950e32)