add new display HW attribute to report PCI ID

include vendor ID and device ID

Signed-off-by: XinfengZhang <carl.zhang@intel.com>

va/va.h

diff --git a/va/va.h b/va/va.h
index 656311f..957dc53 100644
--- a/va/va.h
+++ b/va/va.h
@@ -5069,6 +5069,11 @@
      * modes of vaCopy
      */
     VADisplayAttribCopy                 = 20,
+    /*
+     * HW attribute. read only. retrieve the device information from backend driver
+     * the value should be combined with vendor ID << 16 | device ID
+     */
+    VADisplayPCIID                      = 21,
 } VADisplayAttribType;
 
 /* flags for VADisplayAttribute */