arch-arm: Add missing override keywords in fault.hh
arch-arm: Add missing override keywords in fault.hh

Change-Id: I94a4bf4a633aeed550f8c01ccae824add3b85eb0
Signed-off-by: Andreas Sandberg <c9f5686ee5bd561c93f9de79681eee75bfa7f36e@arm.com>
Reviewed-by: Nikos Nikoleris <b6a1b3cd9d36c44e9eeb16bc870df3cb2a0cf469@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/4284
Reviewed-by: Jason Lowe-Power <68c46a606457643eab92053c1c05574abb26f861@lowepower.com>
Reviewed-by: Curtis Dunham <14490907fdc9c150c92157b82121c81003bbdc71@arm.com>

sobercoder/gem5,gem5/gem5,TUD-OS/gem5-dtu,gem5/gem5,gem5/gem5,sobercoder/gem5,TUD-OS/gem5-dtu,TUD-OS/gem5-dtu,sobercoder/gem5,sobercoder/gem5,gem5/gem5,gem5/gem5,sobercoder/gem5,gem5/gem5,TUD-OS/gem5-dtu,sobercoder/gem5,TUD-OS/gem5-dtu,gem5/gem5,sobercoder/gem5,TUD-OS/gem5-dtu,TUD-OS/gem5-dtu