omx: prevent input port enable/disable for software codecs am: 2b94fa8277 am: c83b53c9e5 am: f054728108 am: 062fd4a341 am: 45fb504379 am: 56fb1ed051 am: e02be17174
am: 7f58e2ec8f

Change-Id: I7bd9e7729139c95eee4fa263174ca3943d28f9c9