n80xx: Fix audio routing according to original settings

Change-Id: Id542242b50641c5f6c94f477e1e0919204a98a48
n80xx: Fix audio routing according to original settings and headset mic during phonecalls

Change-Id: Id542242b50641c5f6c94f477e1e0919204a98a48
n80xx-common: tablets don't have earpiece