Merge branch 'netsec-driver-improvements'

Ilias Apalodimas says:

====================
netsec driver improvements

This patchset introduces some improvements on socionext netsec driver.
 - patch 1/2, avoids unneeded MMIO reads on the Rx path
 - patch 2/2, is adjusting the numbers of descriptors used

Changes since v1:
 - Move dma_rmb() to protect descriptor accesses until the device
 has updated the NETSEC_RX_PKT_OWN_FIELD bit
====================

Signed-off-by: David S. Miller <davem@davemloft.net>