vop2: Add clock resets support

Detlev Casanovarequested to merge
rk3588-vop-add-vp-resets into rk3588

At the end on initialization, the VPs need to be reset before they can be used.

Failing to do so can put the VOP in an undefined state where the generated HDMI signal is either lost or not matching the selected mode.

Edited by Detlev Casanova

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