[PATCH] powerpc: Do not run IFUNC resolvers for LD_DEBUG=unused [BZ #24214]

[Florian Weimer]

* Adhemerval Zanella:

> This patch adds the missing bits for powerpc and fixes both
> tst-ifunc-fault-lazy and tst-ifunc-fault-bindnow failures on
> powerpc-linux-gnu.

Thanks.  Patch looks good.

Florian