mptcp: use OPTIONS_MPTCP_MPC

Since OPTIONS_MPTCP_MPC has been defined, use it instead of open-coding.
Acked-by: NPaolo Abeni <pabeni@redhat.com>
Signed-off-by: NGeliang Tang <geliangtang@xiaomi.com>
Signed-off-by: NMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/mptcp/options.c

@@ -748,9 +748,7 @@ static bool mptcp_established_options_mp_prio(struct sock *sk,
 	/* can't send MP_PRIO with MPC, as they share the same option space:
 	 * 'backup'. Also it makes no sense at all
 	 */
-	if (!subflow->send_mp_prio ||
-	    ((OPTION_MPTCP_MPC_SYN | OPTION_MPTCP_MPC_SYNACK |
-	      OPTION_MPTCP_MPC_ACK) & opts->suboptions))
+	if (!subflow->send_mp_prio || (opts->suboptions & OPTIONS_MPTCP_MPC))
 		return false;
 
 	/* account for the trailing 'nop' option */
@@ -1327,8 +1325,7 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
 						   TCPOPT_NOP << 8 | TCPOPT_NOP, ptr);
 			}
 		}
-	} else if ((OPTION_MPTCP_MPC_SYN | OPTION_MPTCP_MPC_SYNACK |
-		    OPTION_MPTCP_MPC_ACK) & opts->suboptions) {
+	} else if (OPTIONS_MPTCP_MPC & opts->suboptions) {
 		u8 len, flag = MPTCP_CAP_HMAC_SHA256;
 
 		if (OPTION_MPTCP_MPC_SYN & opts->suboptions) {