hlte: Re-organize tree to become GSM HLTE device tree

Change-Id: Ie9befc14ce3da02d0518ae0e973553cad8d1705e
hlte: Set system properties for GSM HLTE devices only

Change-Id: Id99670ee2cff06874fcb6ffb88a63d44b08f73bf
hlte: Clean up copyright info, naming

Change-Id: If550b884d2f4ed2f4cf8bc7e9ad3e09c46744f95
hlte: Inherit from hlte-common

Change-Id: Ibea460a18ff9526834c4a0503ae0d59a60922c29