bnxt_en: Add support for mdio read/write to external PHY
Add support for SIOCGMIIREG and SIOCSMIIREG ioctls to mdio read/write to external PHY. Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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