linux(4): Quiesce unrecognized ioctl warning for F2FS query

On Linux, sqlite probes for underlying F2FS filesystems that support
certain kinds of atomic update with this ioctl. The expected result on
non-F2FS filesystem (i.e., all FreeBSD filesystems) is any error value.

Minimally implement the ioctl and avoid the warning message.

(This shows up in Linux Chrome, which embeds sqlite.)

Reviewed by: emaste, trasz
Differential Revision: https://reviews.freebsd.org/D27050