[RESEND PATCH V2] arm64: fault: avoid send SIGBUS two times

[gengdongjiu]

> Reviewed-by: James Morse <james.morse at arm.com>
> 
> 
> Nit: Your 'RESEND V2' and 'V2' are not the same patch.
> 'RESEND' is to indicate you're reposting exactly the same patch, usually with a
> fixed CC list. Anyone who receives both can ignore one as you've said they are
> the same.

James,
  Thanks for the reminder and guild, I will send a version V3 to eliminate this confusion