Staging: gs_fpgaboot: remove FSF's mailing address from io.h

This patch removes FSF's mailing address issue from io.h found by
checkpatch.pl tool.

Signed-off-by: Shubham Kumaram <shubhamkumaram@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>