blktap2.py: correct TapCtl.commit call

Signed-off-by: Damien Thenot <[email protected]>

Author: Nambrok

drivers/blktap2.py

@@ -446,7 +446,7 @@ def major(cls):
 
     @classmethod
     def commit(cls, pid, minor, vdi_type, path):
-        args = ["commit", "-p", pid, "-m", minor, "-a", "{}:{}".format(vdi_type, path)]
+        args = ["commit", "-p", pid, "-m", minor, "-a", path]
         cls._pread(args)
 
     @classmethod