powerpc/mm/radix: Fix build error when RADIX_MMU=n

[Michael Ellerman]

On Wed, 2018-01-31 at 14:13:10 UTC, Michael Ellerman wrote:
> The recent TLB flush rework broke the build when the Radix MMU is
> disabled at build time, eg:
> 
>   (.text+0x264): undefined reference to `.radix__tlbiel_all'
> 
> We could add an empty version, but if we ever called it by accident
> that would indicate a bad bug, so add a stub that just WARNs if we do.
> 
> Fixes: d4748276ae14 ("powerpc/64s: Improve local TLB flush for boot and MCE on POWER9")
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Applied to powerpc next.

https://git.kernel.org/powerpc/c/015eb1b89e959c9349f0a01803fb8e

cheers