Bluetooth: Controller: Deprecate bt_ctlr_set_public_addr

Deprecate the bt_ctlr_set_public_addr function.
It is unused in the tree, and there is a vendor specific HCI
command that can be used for the same purpose.
The function does not have any tests and is basically
unmaintained.
Additionally it is the only function in the public
controller API, and removing it would allow us to
remove that part completely as unused.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

include/zephyr/bluetooth/controller.h

@@ -29,7 +29,7 @@ extern "C" {
  *
  *  @param addr Public address
  */
-void bt_ctlr_set_public_addr(const uint8_t *addr);
+__deprecated void bt_ctlr_set_public_addr(const uint8_t *addr);
 
 #ifdef __cplusplus
 }