handle "Kana" and "Eisu" keys on Apple Wireless Keyboard (JIS)

PR:		187470
Submitted by:	naito.yuichiro
MFC after:	1 week


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275709 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f