cpufreq: dev_pm_qos_update_request() can return 1 on success

dev_pm_qos_update_request() can return 1 on success, so don't treat
it as an error.

Fixes: 18c4992 ("cpufreq: Add QoS requests for userspace constraints")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq.c

@@ -2528,7 +2528,7 @@ static int cpufreq_boost_set_sw(int state)
 		}
 
 		ret = dev_pm_qos_update_request(policy->max_freq_req, policy->max);
-		if (ret)
+		if (ret < 0)
 			break;
 	}