Merge tag 'mediatek-for-main-2026-07-22' of https://git.u-boot-project.org/u-boot...

Fixes:
* Fixed some wrong parents of VLP clocks on mt8189.
* Added a missing perficfg_ao clock in mt8188.
* Disabled watchdog by default on Genio 510/700.
* Fixed U-Boot DT overrides not included on Genio 510/700.

Cleanups/refactoring:
* Changed how clock parent providers are registered and looked
  up for all MediaTek targets.
* Removed duplicate devicetree node in mt7623.
* Removed unused/non-standard DT properties in mt798{1,6,8}.
* Simplified MAINTAINERS by using N: instead of F: when possible.
* Replaced duplicate driver names in all MediaTek clock drivers.
* Cleaned up MediaTek power domain driver and split into separate
  driver per compatible target.
* Removed unused power domain enablement from mt798{1,6,6a,7,8}.

Features:
* Added power domain driver for mt8188.