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Replace the repeated hardware-reset key with rss_getkey(). Decode each
eight-byte chunk with be64dec() into the register-word array before
programming the five key registers.
This matches the key serialization in DPDK's nicvf_rss_set_key(), added
by commit 7694fab264ac666d62a4cae04f2979991ce64259
("net/thunderx/base: add RSS and RETA configuration"). A raw copy into
the word array on little-endian hosts would reverse bytes within each
register relative to that convention.
Preserve the CPI-algorithm gate, enabled hash fields, and round-robin
indirection table.
Reviewed by: gallatin
MFC after: 2 weeks
Sponsored by: BBOX.io
Differential Revision: https://reviews.freebsd.org/D59806