drm/amd: Add support for a complete pmops action

complete() callbacks are supposed to handle reversing anything
that occurred during prepare() callbacks.  They'll be called on every
power state transition, and will also be called if the sequence is
failed (such as an aborted suspend).

Add support for IP blocks to support this action.

Reviewed-by: Alex Hung <alex.hung@amd.com>
Link: https://lore.kernel.org/r/20250602014432.3538345-2-superm1@kernel.org


Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>