Merge branch 'add-gmac-support-for-rk3576'

Detlev Casanova says:

====================
Add GMAC support for rk3576

Add the necessary constants and functions to support the GMAC devices on
the rk3576.
====================

Link: https://patch.msgid.link/20240823141318.51201-1-detlev.casanova@collabora.com


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