Bluetooth: Controller: Fix missing reset of connection handle

Fix missing reset of connection handle in the LLL context.
During a central connection, if LL reset is called, then
disabled connection context's handle has to be reset
otherwise new connection creation will fail by detecting
that there exists a connection to same peer.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/ull_conn.c

@@ -1929,6 +1929,7 @@ static inline void disable(uint16_t handle)
 					conn, &conn->lll);
 	LL_ASSERT(err == 0 || err == -EALREADY);
 
+	conn->lll.handle = LLL_HANDLE_INVALID;
 	conn->lll.link_tx_free = NULL;
 }