Bluetooth: controller: split: Fix Enc setup reset on rejection

Fix reset of Encryption Procedure state on reception of
REJECT_IND and REJECT_EXT_IND.

This is a regression in commit 79cb615 ("Bluetooth:
controller: split: Port Enc setup to be queueable")

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/ull_conn.c

@@ -3804,6 +3804,7 @@ static void reject_ext_ind_recv(struct ll_conn *conn, struct node_rx_pdu *rx,
 			conn->llcp_enc.pause_tx = 0U;
 
 			/* Procedure complete */
+			conn->llcp_ack = conn->llcp_req;
 			conn->procedure_expire = 0U;
 
 			/* enqueue as if it were a reject ind */
@@ -4705,8 +4706,8 @@ static inline int ctrl_rx(memq_link_t *link, struct node_rx_pdu **rx,
 		conn->llcp_enc.pause_tx = 0U;
 
 		/* Procedure complete */
+		conn->llcp_ack = conn->llcp_req;
 		conn->procedure_expire = 0U;
-
 		break;
 #endif /* CONFIG_BT_CTLR_LE_ENC */