Merge branch 'add-support-for-the-ipq5018-internal-ge-phy'

George Moussalem says:

====================
Add support for the IPQ5018 Internal GE PHY

The IPQ5018 SoC contains an internal Gigabit Ethernet PHY with its
output pins that provide an MDI interface to either an external switch
in a PHY to PHY link architecture or directly to an attached RJ45
connector.

The PHY supports 10BASE-T/100BASE-TX/1000BASE-T link modes in SGMII
interface mode, CDT, auto-negotiation and 802.3az EEE.

The LDO controller found in the IPQ5018 SoC needs to be enabled to drive
power to the CMN Ethernet Block (CMN BLK) which the GE PHY depends on.
The LDO must be enabled in TCSR by writing to a specific register.

In a phy to phy architecture, DAC values need to be set to accommodate
for the short cable length.
====================

Link: https://patch.msgid.link/20250613-ipq5018-ge-phy-v5-0-9af06e34ea6b@outlook.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>