drm/i915/xe2lpd: Add display power well

Add Display Power Well for Xe2_LPD. It's mostly the same as Xe_LPD+,
so reuse the code. PGPICA1 contains type-C capable port slices
which requires the well to power powered up, so add new power well
definition for it.

The DC_OFF fake power well will be added in a follow up commit.

v2: Do not rmw as bit 31 is the only R/W bit in the register (Matt Roper)

BSpec: 68886
Signed-off-by: Ravi Kumar Vodapalli <ravi.kumar.vodapalli@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230919192128.2045154-20-lucas.demarchi@intel.com