thermal: intel: int340x: Fix Panther Lake DLVR support

Panther Lake uses the same DLVR register offsets as Lunar Lake, but the
driver uses the default register offsets table for it by mistake.

Move the selection of register offsets table from the actual attribute
read/write callbacks to proc_thermal_rfim_add() and make it handle
Panther Lake the same way as Lunar Lake.  This way it is clean and in
the future such issues can be avoided.

Fixes: e50eeaba ("thermal: intel: int340x: Panther Lake DLVR support")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20250411115438.594114-1-srinivas.pandruvada@linux.intel.com


[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>