staging: gpib: Add pc2 GPIB driver

Driver for pc2 compatible boards for Computer Equipment Corporation,
Hameg and ohters

Signed-off-by: Dave Penkler <dpenkler@gmail.com>
Link: https://lore.kernel.org/r/20240918121908.19366-21-dpenkler@gmail.com


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