Renaming dtbo_node to dtbo_label

crosvm expects dtbo_label to find nodes's full path from __symbols__,
so we'd better to match naming.

Bug: 304643002
Test: TH
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:2804273713d743f0b0b6986318f72c8a1f86ee20)
Merged-In: Iee3792f1203278d6dd261750d0dc318662783a11
Change-Id: Iee3792f1203278d6dd261750d0dc318662783a11
diff --git a/virtualizationservice/assignable_devices.xsd b/virtualizationservice/assignable_devices.xsd
index 8f43019..2fbc1c9 100644
--- a/virtualizationservice/assignable_devices.xsd
+++ b/virtualizationservice/assignable_devices.xsd
@@ -25,7 +25,7 @@
     </xs:element>
     <xs:complexType name="device">
         <xs:attribute name="kind" type="xs:string"/>
-        <xs:attribute name="dtbo_node" type="xs:string"/>
+        <xs:attribute name="dtbo_label" type="xs:string"/>
         <xs:attribute name="sysfs_path" type="xs:string"/>
     </xs:complexType>
 </xs:schema>