staging: gpib: hp_82341: Replace manual comparison with min/max macro

This improves code readability by using the standard kernel macro
for min/max value selection while maintaining identical functionality.

Signed-off-by: Yuesong Li <liyuesong@vivo.com>
Link: https://lore.kernel.org/r/20250619080822.677662-1-liyuesong@vivo.com


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