Request for testing bus_get_bus_tag() nexus method

Hello,

I am looking for testers for a patch to add BUS_GET_BUS_TAG method to some
platforms nexus that return per platform specific default tag.

It works fine on arm, but I do not have any powerpc or mips hardware to
test it on,
so I would like it if this could be tested on these platforms using this
code to check
if it does not break them.

Any comments and feedback are welcome.

Thanks,
Marcin