net: ixgbe: abort with cls u32 divisor groups greater than 1

net: ixgbe: abort with cls u32 divisor groups greater than 1

BugLink: http://bugs.launchpad.net/bugs/1562326
This patch ensures ixgbe will not try to offload hash tables from the
u32 module. The device class does not currently support this so until
it is enabled just abort on these tables.

Interestingly the more flexible your hardware is the less code you
need to implement to guard against these cases.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit db956ae882f4e7aa99c9c242a91ae942d08b6939)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>