pySim-shell: fix verify_adm command

The comman verify_adm does no longer work since the verify_adm method is
no longer available in the card base classes (cards.py). Let's use the
verify_chv method from SimCardCommands instead.

Change-Id: Ic87e1bff221b10d33d36da32b589e2737f6ca9cd
diff --git a/pySim-shell.py b/pySim-shell.py
index 3b56bfd..2e332d3 100755
--- a/pySim-shell.py
+++ b/pySim-shell.py
@@ -781,7 +781,7 @@
                     "cannot find ADM-PIN for ICCID '%s'" % (self._cmd.iccid))
 
         if pin_adm:
-            self._cmd.card.verify_adm(h2b(pin_adm))
+            self._cmd.card._scc.verify_chv(self._cmd.card._adm_chv_num, h2b(pin_adm))
         else:
             raise ValueError("error: cannot authenticate, no adm-pin!")