fusefs: diff reduction of fuse_kernel.h vs the upstream version

fuse_kernel.h is based on Linux's fuse.h. In r349250 I modified
fuse_kernel.h by generating a diff of two versions of Linux's fuse.h and
applying it to our tree. patch succeeded, but it put one chunk in the wrong
location. This commit fixes that. No functional changes.

Sponsored by: The FreeBSD Foundation