r8169: improve initialization of RSS registers on RTL8125/RTL8126

Replace the register addresses with the names used in r8125/r8126
vendor driver, and consider that RSS_CTRL_8125 is a 32 bit register.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/3bf2f340-b369-4174-97bf-fd38d4217492@gmail.com


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