net: stmmac: remove unnecessary priv->eee_active tests

Since priv->eee_active is assigned with a constant value in each of
these methods, there is no need to test its value later. Remove these
unnecessary tests.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1tffdS-003ZHz-Qi@rmk-PC.armlinux.org.uk


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