arch-arm: Remove m5ops_base declaration from ArmSystem
arch-arm: Remove m5ops_base declaration from ArmSystem

This declaration should have been removed but was accidentally re-added.
It keeps m5ops_base from being passed correctly from Python to C++ when
using ARM ISA, and hence triggers gem5 crash when the guest tries to
call m5ops. This change removes it again to fix the crash.

JIRA: https://gem5.atlassian.net/browse/GEM5-658

Change-Id: I8df4ff19ecc0d64255f24dc991f71b065d2a894e
Signed-off-by: Hsuan Hsu <22b5ca1ea7eefa4e50d967611477c8bbe4e31fba@mediatek.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/30914
Reviewed-by: Gabe Black <5c8aa1266c03186393d9e7b3b4e3b14239af8201@google.com>
Reviewed-by: Andreas Sandberg <c9f5686ee5bd561c93f9de79681eee75bfa7f36e@arm.com>
Maintainer: Andreas Sandberg <c9f5686ee5bd561c93f9de79681eee75bfa7f36e@arm.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
(cherry picked from commit e3793fd8a9b7096a67a0f4260a36cd4dd5afe72f)
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/30955
Reviewed-by: Bobby R. Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>
Reviewed-by: Hsuan Hsu <436d2f1ef9be50b6b0688112b026c16eeb417ce2@gmail.com>
Maintainer: Bobby R. Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>

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