Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/cpufreq/loongson2_cpufreq.c b/drivers/cpufreq/loongson2_cpufreq.c
index da34469..890813e 100644
--- a/drivers/cpufreq/loongson2_cpufreq.c
+++ b/drivers/cpufreq/loongson2_cpufreq.c
@@ -95,7 +95,8 @@
 	}
 
 	policy->clk = cpuclk;
-	return cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
+	cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
+	return 0;
 }
 
 static int loongson2_cpufreq_exit(struct cpufreq_policy *policy)