drivers: bluetooth: silabs_efr32: Declares periodic sync feature

Adds declaration for Periodic Advertising Synchronization Establishment
procedure supported by controller.

Signed-off-by: Evgenii Kosenko <[email protected]>

Author: kedMertens

drivers/bluetooth/hci/Kconfig

@@ -171,6 +171,9 @@ config BT_SILABS_EFR32
 	select BT_CTLR_ADV_EXT_SUPPORT
 	select BT_CTLR_PRIVACY_SUPPORT
 	select BT_CTLR_PHY_2M_SUPPORT
+	select BT_CTLR_SYNC_PERIODIC_SUPPORT
+	select BT_CTLR_SYNC_TRANSFER_RECEIVER_SUPPORT
+	select BT_CTLR_SYNC_TRANSFER_SENDER_SUPPORT
 	help
 	  Use Silicon Labs binary Bluetooth library to connect to the
 	  controller.