Fix functionality of mountconfig module

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 933f385f5d)

mountconfig/MicroHAL.py

@@ -817,7 +817,7 @@ class MicroHAL(object):
         if proc not in self.getSupportedFileSystems():
             # The filesystem is not supported by the running kernel,
             # but it might be built as module, so we try to load that.
-            retval, msg = SimpleCommandRunner().run([b"/sbin/modprobe",module])
+            retval, msg = SimpleCommandRunner().run([b"/sbin/modprobe",module.encode('utf-8')])
             if retval > 0:
                 print(msg)
                 print("Couldn't load driver " + module + " for filesystem " + fs)