Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/cpufreq/amd_freq_sensitivity.c b/drivers/cpufreq/amd_freq_sensitivity.c
index be926d9..e2df9d1 100644
--- a/drivers/cpufreq/amd_freq_sensitivity.c
+++ b/drivers/cpufreq/amd_freq_sensitivity.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * amd_freq_sensitivity.c: AMD frequency sensitivity feedback powersave bias
  *                         for the ondemand governor.
@@ -5,10 +6,6 @@
  * Copyright (C) 2013 Advanced Micro Devices, Inc.
  *
  * Author: Jacob Shin <jacob.shin@amd.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/kernel.h>
@@ -111,15 +108,20 @@
 {
 	u64 val;
 	struct pci_dev *pcidev;
+	unsigned int pci_vendor;
 
-	if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+		pci_vendor = PCI_VENDOR_ID_AMD;
+	else if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
+		pci_vendor = PCI_VENDOR_ID_HYGON;
+	else
 		return -ENODEV;
 
-	pcidev = pci_get_device(PCI_VENDOR_ID_AMD,
+	pcidev = pci_get_device(pci_vendor,
 			PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
 
 	if (!pcidev) {
-		if (!static_cpu_has(X86_FEATURE_PROC_FEEDBACK))
+		if (!boot_cpu_has(X86_FEATURE_PROC_FEEDBACK))
 			return -ENODEV;
 	}