r8169: remove original workaround for RTL8125 broken rx issue

r8169: remove original workaround for RTL8125 broken rx issue

Now that we have b9c7ac4fe22c ("r8169: disable ALDPS per default for
RTL8125"), the first attempt to fix the issue shouldn't be needed
any longer. So let's effectively revert 621735f59064 ("r8169: fix
rare issue with broken rx after link-down on RTL8125") and see
whether anybody complains.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/382d8c88-cbce-400f-ad62-fda0181c7e38@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>