NonCachingCPU is replacing the Atomic+fastmem option. Change-Id: I66f5c8a880d1b3fd1331871d89e8d6a229938e57 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/15935 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>