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qlxgb: Derive the firmware RSS key from the common key
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Authored by kbowling on Fri, Sep 18, 8:57 AM.
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Details

Summary
Replace the embedded key with rss_getkey().  Retain the reversed 64-bit
word-pair order and low-word-first layout used by the existing firmware
request, matching the qlxgbe conversion.

The common default produces the same five firmware words as the old
constants.  Leave hash selections, RSS enablement, and the indirection
mask unchanged.

MFC after:      2 weeks
Sponsored by:   BBOX.io

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rG FreeBSD src repository
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