thermal: intel: hfi: Remove a pointless die_id check

die_id is an u16 quantity. On single-die systems the default value of
die_id is 0. No need to check for negative values.

Plus, removing this check makes Coverity happy.
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/thermal/intel/intel_hfi.c

@@ -379,7 +379,7 @@ void intel_hfi_online(unsigned int cpu)
 	die_id = topology_logical_die_id(cpu);
 	hfi_instance = info->hfi_instance;
 	if (!hfi_instance) {
-		if (die_id < 0 || die_id >= max_hfi_instances)
+		if (die_id >= max_hfi_instances)
 			return;
 
 		hfi_instance = &hfi_instances[die_id];