[PATCH] remove powerpc bitops infavor of existing generic bitops

[Paul Mackerras]

Jon Mason writes:

> There already exists a big endian safe bitops implementation in
> lib/find_next_bit.c.  The code in it is 90%+ common with the powerpc
> specific version, so the powerpc version is redundant.  This patch
> makes the necessary changes to use the generic bitops in powerpc, and
> removes the powerpc specific version.

This patch breaks ARCH=ppc builds.  Please resubmit with the necessary
changes to arch/ppc/Kconfig as well.

Paul.