powerpc: remove leftover code of old GCC version checks

[Michael Ellerman]

On Mon, 2018-10-01 at 06:10:24 UTC, Masahiro Yamada wrote:
> Clean up the leftover of commit f2910f0e6835 ("powerpc: remove old
> GCC version checks").
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> Acked-by: Nicholas Piggin <npiggin at gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/bad96de8d31ba65dc26645af555013

cheers