cpu: Disable O3CPU value forwarding with write strobes
cpu: Disable O3CPU value forwarding with write strobes

https://gem5-review.googlesource.com/c/public/gem5/+/19173 did the same
for MinorCPU

Change-Id: I22d631a3d2032570f6e84b0f5eb018d1f84414ef
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23952
Reviewed-by: Bobby R. Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <68c46a606457643eab92053c1c05574abb26f861@lowepower.com>
Maintainer: Jason Lowe-Power <68c46a606457643eab92053c1c05574abb26f861@lowepower.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5