cpu: Stop using macros for constants in the multiperpsective_perceptron.
cpu: Stop using macros for constants in the multiperpsective_perceptron.

Enums work just as well and respect namespaces and scopes.

Change-Id: If726ff325be7114c9a749f5f4e1a193552a24c2b
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45519
Reviewed-by: Gabe Black <d3e8afea784ab4a50a2dbf9149d2eaa8478e1cbc@gmail.com>
Maintainer: Gabe Black <d3e8afea784ab4a50a2dbf9149d2eaa8478e1cbc@gmail.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

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