creator_fb: Implement vd_bitblt_text_t

MFC after:	1 week


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270412 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
ofwfb: Implement vd_bitblt_text_t

MFC after:	1 week


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270413 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f