drm/i915/adlp: Add missing TBT AUX -> PW#2 power domain dependencies

On ADL_P the TBT AUX power wells depend on the PW#2 power well, add the
corresponding power domain dependencies.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210526203456.2733040-1-imre.deak@intel.com