Mechanically convert to if_inc_counter().


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271801 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Add dtrace probe support for zfs SET_ERROR(..)

MFC after:	1 week
Sponsored by:	Multiplay


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271802 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f