powerpc: remove leftover code of old GCC version checks

Clean up the leftover of commit f2910f0e68 ("powerpc: remove old
GCC version checks").

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Masahiro Yamada 2018-10-01 15:10:24 +09:00 • committed by Michael Ellerman
commit bad96de8d3