arch-x86: X86ISA default vector_string to HygonGenuine

This commit,
https://gem5-review.googlesource.com/c/public/gem5/+/64831, changed the
default 'vendor_string' for the 'X86ISA' SimObject from 'M5 Simulator'
and 'AuthenticAMD'. Unforunately due to an issue highlighted here:
https://gem5.atlassian.net/browse/GEM5-1300 we cannot use the
'AuthenticAMD'. Therefore, this change updates the default vector_string
to HygonGenuine.

The HygonGenuine is simple but works.

Change-Id: I21421da8ae73e76d9daaf2fdd0b3238d5b309172
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65492
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65611
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
1 file changed