bnxt_en: Add cache line size setting to optimize performance.
The chip supports 64-byte and 128-byte cache line size for more optimal DMA performance when matched to the CPU cache line size. The default is 64. If the system is using 128-byte cache line size, set it to 128. Signed-off-by: NMichael Chan <michael.chan@broadcom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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