dev-arm: clang compatibility fix, added missing overrides
dev-arm: clang compatibility fix, added missing overrides

Change-Id: I5ee5ff788570178bb1d68878a26ac9e3ce636d8e
Reviewed-by: Giacomo Travaglini <8eef13a4f970e2e9372c8d26ad0737b760f99c02@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/19588
Reviewed-by: Matteo Andreozzi <f2e0eb9c5a6821c3f46bc9057358d645398e28f6@arm.com>
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