thermal: int340x: Fix sysfs group leak on DLVR registration failure

thermal: int340x: Fix sysfs group leak on DLVR registration failure

When DLVR sysfs group creation fails in proc_thermal_rfim_add(),
the function returns immediately without cleaning up the FIVR group
that may have been created earlier.

Add proper error unwinding to remove the FIVR group before returning
failure.

Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/LV3PR11MB876881B77D32A2854AD2908EF563A@LV3PR11MB8768.namprd11.prod.outlook.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>