Add support for 'mode' parameter when creating a macvtap device.
This allows a macvtap device to be created in bridge, private or
the default vepa modes.
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
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Acked-by: Arnd Bergmann <arnd@arndb.de>
Sridhar Samudrala