Merge branch 'net-stmmac-mdio-cleanups'

Russell King says:

====================
net: stmmac: mdio cleanups

Clean up the stmmac MDIO code:
- provide an address register formatter to avoid repeated code
- provide a common function to wait for the busy bit to clear
- pre-compute the CR field (mdio clock divider)
- move address formatter into read/write functions
- combine the read/write functions into a common accessor function
- move runtime PM handling into common accessor function
- rename register constants to better reflect manufacturer names
- move stmmac_clk_csr_set() into stmmac_mdio
- make stmmac_clk_csr_set() return the CR field value and remove
  priv->clk_csr
- clean up if() range tests in stmmac_clk_csr_set()
- use STMMAC_CSR_xxx definitions in initialisers

For Qualcomm QCS9100 Ride R3 board with the AQR115C PHY:

Tested-by: Mohd Ayaan Anwar <quic_mohdayaa@quicinc.com>
====================

Link: https://patch.msgid.link/aLmBwsMdW__XBv7g@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>