Merge branch 'r8152'

Hayes Wang says:

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r8152: tx/rx improvement

 - Select the suitable spin lock for each function.
 - Add additional check to reduce the spin lock.
 - Up the priority of the tx to avoid interrupted by rx.
 - Support rx checksum, large send, and IPv6 hw checksum.
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Signed-off-by: David S. Miller <davem@davemloft.net>