Bluetooth: SMP: Add support for Identity Information over BR/EDR

Allow to handle IRK distributed by remote device.

> ACL Data RX: Handle 11 flags 0x02 dlen 21
      BR/EDR SMP: Identity Information (0x08) len 16
        Identity resolving key: 286f917356baf6aa27f169fe30030c88
> ACL Data RX: Handle 11 flags 0x02 dlen 12
      BR/EDR SMP: Identity Address Information (0x09) len 7
        Address type: Public (0x00)
        Address: 20:68:9D:60:A1:E4

Jira: ZEP-605

Change-Id: I3c7d32cc6e4cf4d8690edb92089bd433e06f1b4d
Signed-off-by: Szymon Janc <ext.szymon.janc@tieto.com>