net: dsa: Add dsa_is_dsa_port() helper
Add an inline helper for determining is a port is a DSA port. Signed-off-by: NAndrew Lunn <andrew@lunn.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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Add an inline helper for determining is a port is a DSA port. Signed-off-by: NAndrew Lunn <andrew@lunn.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>