[CPUFREQ] Longhaul - Add support for CN400

Support for CN400 northbridge when ACPI C3 isn't available.
Tested on Epia SP13000. Thanks to Robert for testing it.
Signed-off-by: NRafa Bilski <rafalbilski@interia.pl>
Signed-off-by: NDave Jones <davej@redhat.com>

arch/i386/kernel/cpu/cpufreq/longhaul.c

@@ -583,6 +583,10 @@ static int enable_arbiter_disable(void)
 	if (dev == NULL) {
 		reg = 0x76;
 		dev = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_862X_0, NULL);
+		/* Find CN400 V-Link host bridge */
+		if (dev == NULL)
+			dev = pci_find_device(PCI_VENDOR_ID_VIA, 0x7259, NULL);
+
 	}
 	if (dev != NULL) {
 		/* Enable access to port 0x22 */
@@ -734,7 +738,7 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
 	return 0;
 
 err_acpi:
-	printk(KERN_ERR PFX "No ACPI support. No VT8601 or VT8623 northbridge. Aborting.\n");
+	printk(KERN_ERR PFX "No ACPI support. Unsupported northbridge. Aborting.\n");
 	return -ENODEV;
 }