NET: Add Ethernet 1000BASE-X support for PPC4xx
This patch adds support for 1000BASE-X to functions "miiphy_speed ()" and "miiphy_duplex()". It also adds function "miiphy_is_1000base_x ()", which returns non-zero iff the PHY registers are configured for 1000BASE-X. The "mii info" command is modified to distinguish between 1000BASE-T and -X. Signed-off-by: NLarry Johnson <lrj@acm.org> Signed-off-by: NBen Warren <bwarren@qstreams.com>
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