staing: gpib: struct typing for gpib_board_config

staing: gpib: struct typing for gpib_board_config

Using Linux code style for gpib_board_config struct in .h to allow drivers to
migrate.

Adhering to Linux code style.

In general, a pointer, or a struct that has elements that can reasonably be
directly accessed should never be a typedef.

Reported by CheckPatch

WARNING: do not add new typedefs

Signed-off-by: Michael Rubin <matchstick@neverthere.org>
Link: https://lore.kernel.org/r/20250408223659.187109-2-matchstick@neverthere.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>