Merge branch 'fs_enet-opt'

Christophe Leroy says:

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Optimisation of fs_enet ethernet driver

This set optimises the freescale fs_enet ethernet driver:
1/ Merge of RX and TX NAPI functions in order to limit the amount of
interrupts
2/ Do not unmap DMA when packets len is below copybreak, otherwise there
is no benefit in copying the skb instead of allocating a new one
3/ Make copybreak value configurable as the optimised value is not the
same on all targets
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Signed-off-by: David S. Miller <[email protected]>

Author: davem330