Bluetooth: Process extended ADV report event

This patch enables Extended ADV report event if extended scanning
is supported in the controller and process the same.

The new features are not handled and for now its as good as
legacy ADV report.

> HCI Event: LE Meta Event (0x3e) plen 53
      LE Extended Advertising Report (0x0d)
        Num reports: 1
        Entry 0
          Event type: 0x0013
            Props: 0x0013
              Connectable
              Scannable
              Use legacy advertising PDUs
            Data status: Complete
          Legacy PDU Type: ADV_IND (0x0013)
          Address type: Random (0x01)
          Address: DB:7E:2E:1A:85:E8 (Static)
          Primary PHY: LE 1M
          Secondary PHY: LE 1M
          SID: 0x00
          TX power: 0 dBm
          RSSI: -90 dBm (0xa6)
          Periodic advertising invteral: 0.00 msec (0x0000)
          Direct address type: Public (0x00)
          Direct address: 00:00:00:00:00:00 (OUI 00-00-00)
          Data length: 0x1b
        0f 09 44 65 73 69 67 6e 65 72 20 4d 6f 75 73 65  ..Designer Mouse
        03 19 c2 03 02 01 05 03 03 12 18                 ...........

Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>