am 4da7dff5: Merge change 4731 into donut

Merge commit '4da7dff5e79e57494b58a97b285c53c111b18c82'

* commit '4da7dff5e79e57494b58a97b285c53c111b18c82':
  gsm: Remove PppLink since pppd_gprs service does not exist.