Added LoongArch64 architecture CPU IO width. https://bugzilla.tianocore.org/show_bug.cgi?id=4584 Cc: Leif Lindholm <quic_llindhol@quicinc.com> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Abner Chang <abner.chang@amd.com> Cc: Daniel Schaefer <git@danielschaefer.me> Signed-off-by: Chao Li <lichao@loongson.cn> Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>