common: Add sigmahal 64-bit instance

Change-Id: I0510f0d1a3279bca7aa65202770571c0fc98ed47
diff --git a/compatibility_matrix.xml b/compatibility_matrix.xml
index d303a5e..a38c4e5 100644
--- a/compatibility_matrix.xml
+++ b/compatibility_matrix.xml
@@ -81,6 +81,7 @@
         <interface>
             <name>Isigma_miracast</name>
             <instance>sigmahal</instance>
+            <instance>sigmahal64</instance>
         </interface>
    </hal>
       <hal format="hidl" optional="true">