Bluetooth: btintel: Add DSBR support for BlazarIW, BlazarU and GaP

Add DSBR support for BlazarIW, BlazarU and Gale Peak2 cores.

Refer commit eb9e749c ("Bluetooth: btintel: Allow configuring drive
strength of BRI") for details about DSBR.

Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>