mptcp: use _BITUL() instead of (1 << x)

#define MPTCP_PM_EV_FLAG_DENY_JOIN_ID0		_BITUL(0)

#define MPTCP_PM_EV_FLAG_SERVER_SIDE		_BITUL(1)

#define MPTCP_PM_ADDR_FLAG_SIGNAL                      (1 << 0)

#define MPTCP_PM_ADDR_FLAG_SUBFLOW                     (1 << 1)

#define MPTCP_PM_ADDR_FLAG_BACKUP                      (1 << 2)

#define MPTCP_PM_ADDR_FLAG_FULLMESH                    (1 << 3)

#define MPTCP_PM_ADDR_FLAG_IMPLICIT                    (1 << 4)

#define MPTCP_PM_ADDR_FLAG_SIGNAL		_BITUL(0)

#define MPTCP_PM_ADDR_FLAG_SUBFLOW		_BITUL(1)

#define MPTCP_PM_ADDR_FLAG_BACKUP		_BITUL(2)

#define MPTCP_PM_ADDR_FLAG_FULLMESH		_BITUL(3)

#define MPTCP_PM_ADDR_FLAG_IMPLICIT		_BITUL(4)

struct mptcp_info {

	__u8	mptcpi_subflows;