powercap: intel_rapl_msr: Add PL4 support for Arrowlake-U

Add PL4 support for ArrowLake-U platform.

Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20240930081801.28502-5-rui.zhang@intel.com


Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>