r8169: refactor chip version detection

Refactor chip version detection and merge both configuration tables.
Apart from reducing the code by a third, this paves the way for
merging chip version handling if only difference is the firmware.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://patch.msgid.link/1fea533a-dd5a-4198-a9e2-895e11083947@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>