Prevent oops on enc28j60 packet RX:  make sure buffers are aligned.
Not all architectures support unaligned accesses in kernel space.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Acked-by: NClaudio Lanconelli <lanconelli.claudio@eptar.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>