Merge branch 'net-stmmac-stmmac_pltfr_find_clk'

Russell King says:

====================
net: stmmac: stmmac_pltfr_find_clk()

The GBETH glue driver that is being proposed duplicates the clock
finding from the bulk clock data in the stmmac platform data structure.
iLet's provide a generic implementation that glue drivers can use, and
convert dwc-qos-eth to use it.
====================

Link: https://patch.msgid.link/Z_Yn3dJjzcOi32uU@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>