PCI: make pci_ltr_supported() static

The PCI Express Latency Tolerance Reporting (LTR) feature's
pci_ltr_supported() routine is currently only used within
drivers/pci/pci.c so make it static.

Acked-by: Donald Dutile <ddutile@redhat.com>
Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 447e834..847e0c3 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2169,7 +2169,7 @@
  * RETURNS:
  * True if @dev supports latency tolerance reporting, false otherwise.
  */
-bool pci_ltr_supported(struct pci_dev *dev)
+static bool pci_ltr_supported(struct pci_dev *dev)
 {
 	int pos;
 	u32 cap;
@@ -2185,7 +2185,6 @@
 
 	return cap & PCI_EXP_DEVCAP2_LTR;
 }
-EXPORT_SYMBOL(pci_ltr_supported);
 
 /**
  * pci_enable_ltr - enable latency tolerance reporting