[fix] Set AMP_CORE_MASK correctly

recipes-core/toki/toki-amp-instance_git.bb

@@ -7,7 +7,7 @@ python() {
     # bit-mask for all cores including master
     master_core = d.getVar("TOKI_MASTER_CORE", True)
     all_cores = slave_cores.split() + [master_core]
-    all_cores_mask = sum(1 << int(i) for i in slave_cores.split())
+    all_cores_mask = sum(1 << int(i) for i in all_cores)
     d.setVar("TOKI_CORE_MASK", str(all_cores_mask))
 }