Always select the card before we do the 4.x specific stuff and
deselect it after setting the block size. This is a similar bug that
was fixed elsewhere, but not here. This makes sure that we leave the
card deselected at the end of the loop, and we don't send any commands
to the card without it selected.

Reviewed by: ian@


git-svn-id: svn+ssh://svn.freebsd.org/base/head@276106 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f