fixup 2:: ARM: kirkwood: add gigabit ethernet and mvmdio device tree nodes

fixup kirkwood ethernet-port numbering mess

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
fixup 3:: ARM: kirkwood: add gigabit ethernet and mvmdio device tree nodes

fixup guruplug phy compatible strings

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>