staging: ft1000_pcmcia: staticize local functions in ft1000_dnld.c

Several functions in ft1000_dnld.c are not used outside that file, make
them static

Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>