Merge branch 'phy-mediatek-reorg'

Sky Huang says:

====================
Re-organize MediaTek ethernet phy drivers and propose mtk-phy-lib

This patchset comes from patch 1/9, 3/9, 4/9, 5/9 and 7/9 of:
https://lore.kernel.org/netdev/20241004102413.5838-1-SkyLake.Huang@mediatek.com/

This patchset changes MediaTek's ethernet phy's folder structure and
integrates helper functions, including LED & token ring manipulation,
into mtk-phy-lib.

---
Change in v2:
- Add correct Reviewed-by tag in each patch.

Change in v3:
[patch 4/5]
- Fix kernel test robot error by adding missing MTK_NET_PHYLIB.
====================

Signed-off-by: Sky Huang <skylake.huang@mediatek.com>