cpufreq: amd_freq_sensitivity: Add missing pci_dev_put()

pci_get_device() will increase the reference count for the returned
pci_dev. We need to use pci_dev_put() to decrease the reference count
after using pci_get_device(). Let's add it.

Fixes: 59a3b3a8 ("cpufreq: AMD: Ignore the check for ProcFeedback in ST/CZ")
Signed-off-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/amd_freq_sensitivity.c

@@ -125,6 +125,8 @@ static int __init amd_freq_sensitivity_init(void)
 	if (!pcidev) {
 		if (!boot_cpu_has(X86_FEATURE_PROC_FEEDBACK))
 			return -ENODEV;
+	} else {
+		pci_dev_put(pcidev);
 	}
 
 	if (rdmsrl_safe(MSR_AMD64_FREQ_SENSITIVITY_ACTUAL, &val))