staging: gpib: comment out pnp_device_id tables

staging: gpib: comment out pnp_device_id tables

This variable is not referenced in either of these two drivers driver,
causing a warning when they are built-in and W=1 warnings are enabled
with gcc:

drivers/staging/gpib/tnt4882/tnt4882_gpib.c:1507:35: error: 'tnt4882_pnp_table' defined but not used [-Werror=unused-const-variable=]
 1507 | static const struct pnp_device_id tnt4882_pnp_table[] = {
      |                                   ^~~~~~~~~~~~~~~~~
drivers/staging/gpib/hp_82341/hp_82341.c:811:35: error: 'hp_82341_pnp_table' defined but not used [-Werror=unused-const-variable=]
  811 | static const struct pnp_device_id hp_82341_pnp_table[] = {

The MODULE_DEVICE_TABLE() entry does have the effect of loading
the module when the PNP device is detected, so it is still needed
for the modular case.

Ideally the drivers should be converted to pnp_register_driver(),
which would lead to the ID table actually being used.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20250217131356.3759347-2-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>