Mechanically convert to if_inc_counter().


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271862 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Mechanically convert to if_inc_counter().


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271863 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f