staging: dgap: remove unused brd->state states

This patch removes unused brd->state states previously
used in the userland firmware download process.

Signed-off-by: Mark Hounschell <markh@compro.net>
Tested-by: Mark Hounschell <markh@compro.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>