drm/i915/adl_s: Add power wells

TGL power wells can be re-used for ADL-S with the exception of the fake
power well for TC_COLD, just like DG-1.

BSpec: 53597
Bspec: 49231

Cc: Imre Deak <imre.deak@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Aditya Swarup <aditya.swarup@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Aditya Swarup <aditya.swarup@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210129182945.217078-3-aditya.swarup@intel.com