thermal: intel: int340x: Cleanup of DLVR sysfs on driver remove

thermal: intel: int340x: Cleanup of DLVR sysfs on driver remove

When only DLVR enabled without DVFS, during driver remove,
proc_thermal_rfim_remove() is not called. Hence the DLVR sysfs is not
deleted.

On Lunar Lake DLVR is enabled without DVFS, hence this issue can be
reproduced.

Check also PROC_THERMAL_FEATURE_DLVR to call proc_thermal_rfim_remove().

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20240619124600.491168-2-srinivas.pandruvada@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>