port-mips/54216: Inconsistent ifdef in mips/bus_dma.c

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

>Number:         54216
>Category:       port-mips
>Synopsis:       Inconsistent #ifdef in mips/bus_dma.c
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    port-mips-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun May 19 00:00:01 +0000 2019
>Originator:     Izumi Tsutsui
>Release:        NetBSD 8.1_RC1
>Organization:
>Environment:
System: NetBSD 8.1_RC1
Architecture: mips
Machine: all mips
>Description:
src/sys/arch/mips/mips/bus_dma.c rev 1.38 has the following ifdefs:
 https://nxr.netbsd.org/xref/src/sys/arch/mips/mips/bus_dma.c?r=1.38

    191 #ifdef __mips_o32
    831 #ifdef _mips_o32
    873 #ifdef mips_o32

>How-To-Repeat:
Code inspection.

>Fix:
N/A