net: mvpp2: take advantage of the is_rgmii helper

Convert all RGMII checks to use the phy_interface_mode_is_rgmii()
helper. This is a cosmetic patch.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed