staging: cxt1e1: removed version string declaration

Removed the unneeded pmcc4_OSSI_release version string, as well as the now
unused 'release' element of the sbe_card_info struct.  This also resolves a
sparse "should it be static" warning.

Signed-off-by: Shaun Laing <shaun@xresource.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>