Merge branch 'net-phy-dp83867-always-program-r-sgmii-enable-bits'

Sean Anderson says:

====================
net: phy: dp83867: Always program R/SGMII enable bits

The hardware designers at my company neglected to read the datasheet for
this PHY and did not add appropriate resistors to configure it for
SGMII. Add support for configuring the it based on phy-mode instead of
relying on the resistors for a suitable default.
====================

Link: https://patch.msgid.link/20260129171205.3868605-1-sean.anderson@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>