Add virHostdevFindUSBDevice to private symbols

Finding an USB device from the vendor/device values will be needed
by libxl driver to convert from vendor/device to bus/dev addresses.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

src/libvirt_private.syms

@@ -1648,6 +1648,7 @@ virHookPresent;
 
 
 # util/virhostdev.h
+virHostdevFindUSBDevice;
 virHostdevManagerGetDefault;
 virHostdevPCINodeDeviceDetach;
 virHostdevPCINodeDeviceReAttach;

src/util/virhostdev.c

@@ -1178,7 +1178,7 @@ virHostdevMarkUSBDevices(virHostdevManagerPtr mgr,
 }
 
 
-static int
+int
 virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
                         bool mandatory,
                         virUSBDevicePtr *usb)

src/util/virhostdev.h

@@ -66,6 +66,12 @@ virHostdevPreparePCIDevices(virHostdevManagerPtr hostdev_mgr,
                             unsigned int flags)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
     ATTRIBUTE_NONNULL(4);
+
+int
+virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
+                        bool mandatory,
+                        virUSBDevicePtr *usb)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(3);
 int
 virHostdevPrepareUSBDevices(virHostdevManagerPtr hostdev_mgr,
                             const char *drv_name,