Bluetooth: Controller: Handle overlapping buffers on ull_adv{.c,_aux.c}

* Setting the adv data, scan rsp and adv aux ad data can happen on
overlapping buffers
* There can be other memcpy's that need to be changed to memmove but
these are the only ones I could reproduce the issue and since memmove
has a performance penalty, I left the others as is.

Signed-off-by: Yago Fontoura do Rosario <yafo@demant.com>

subsys/bluetooth/controller/ll_sw/ull_adv.c

@@ -1870,7 +1870,7 @@ uint8_t ull_adv_data_set(struct ll_adv_set *adv, uint8_t len,
 
 	pdu->tx_addr = prev->tx_addr;
 	pdu->rx_addr = prev->rx_addr;
-	memcpy(&pdu->adv_ind.addr[0], &prev->adv_ind.addr[0], BDADDR_SIZE);
+	memmove(&pdu->adv_ind.addr[0], &prev->adv_ind.addr[0], BDADDR_SIZE);
 	memcpy(&pdu->adv_ind.data[0], data, len);
 	pdu->len = BDADDR_SIZE + len;
 
@@ -1926,7 +1926,7 @@ uint8_t ull_scan_rsp_set(struct ll_adv_set *adv, uint8_t len,
 	pdu->tx_addr = prev->tx_addr;
 	pdu->rx_addr = 0;
 	pdu->len = BDADDR_SIZE + len;
-	memcpy(&pdu->scan_rsp.addr[0], &prev->scan_rsp.addr[0], BDADDR_SIZE);
+	memmove(&pdu->scan_rsp.addr[0], &prev->scan_rsp.addr[0], BDADDR_SIZE);
 	memcpy(&pdu->scan_rsp.data[0], data, len);
 
 	/* Update time reservation */

subsys/bluetooth/controller/ll_sw/ull_adv_aux.c

@@ -2020,7 +2020,7 @@ uint8_t ull_adv_aux_hdr_set_clear(struct ll_adv_set *adv,
 
 		sec_dptr -= BDADDR_SIZE;
 
-		(void)memcpy(sec_dptr, bdaddr, BDADDR_SIZE);
+		(void)memmove(sec_dptr, bdaddr, BDADDR_SIZE);
 	}
 
 	/* Set the common extended header format flags in the current primary