intel_th: pci: Enable bus mastering

The driver forgets to enable bus mastering for the PCI device.
Fix this.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>

drivers/hwtracing/intel_th/pci.c

@@ -46,6 +46,8 @@ static int intel_th_pci_probe(struct pci_dev *pdev,
 	if (IS_ERR(th))
 		return PTR_ERR(th);
 
+	pci_set_master(pdev);
+
 	return 0;
 }