[ofw] [PATCH] [IBAT] ibat: fix slow build

[Sean Hefty]

>> >Would you please explain why you removed MSC_WARNING_LEVEL= /W4 ?
>>
>> I set the source file to use the default warning level.  Is there
>> some reason to override the default?
>
>Yeah, you get more warnings in case you do something dumb.

I can set the warning back.  Is there any issue with changing the includes, or
can anyone else verify that that change speeds up the build for them?