staging: gpib: mark FMH driver as broken

When doing a 'make allyesconfig' things break in this driver due to
duplicate symbols, so mark it broken for now until that can be fixed up.

Cc: Dave Penkler <dpenkler@gmail.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/20241015165538.634707e5@canb.auug.org.au
Link: https://lore.kernel.org/r/2024101628-jazz-radial-3400@gregkh


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>