Allow dual-mode devices to be processed by BR/EDR scan

This change lets a Dual mode device which is already processed
as LE device for the current inquiry, to be also processed as
a BR/EDR device in case an extended inquiry result is recvd.
This helps setting the cod correctly.

Change-Id: I0a0c598ebdafe2b6153015c3cda5dde8f7a15873