nfp: read ME frequency from vNIC ctrl memory
PCIe island clock frequency is used when converting coalescing parameters from usecs to NFP timestamps. Most chips don't run at 1200MHz, allow FW to provide us with the real frequency. Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: NDirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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