staging: gs_fpgaboot: remove checks for CONFIG_B4860G100

There are two checks for CONFIG_B4860G100 in this driver. But there's no
Kconfig symbol B4860G100. These checks will always evaluate to false.
Remove them and the code they hide.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>