Currently we take generic/default code-path on AMD due to misspelling.
Mostly helps with crc+memcpy:

name                            old speed               new speed               delta
BM_Memcpy/1                      156MB/s ± 1%            156MB/s ± 1%     ~           (p=0.563 n=18+18)
BM_Memcpy/100                   6.38GB/s ± 1%           6.50GB/s ± 1%   +1.89%        (p=0.000 n=19+19)
BM_Memcpy/10000                 14.6GB/s ± 1%           21.7GB/s ± 0%  +49.01%        (p=0.000 n=20+19)
BM_Memcpy/500000                13.5GB/s ± 1%           19.9GB/s ± 0%  +47.35%        (p=0.000 n=18+17)

PiperOrigin-RevId: 490572650
Change-Id: Id7901321a23262c0ab62a2d82fae86cf42acf16d