powerpc/64s/exception: move SET_SCRATCH0 into EXCEPTION_PROLOG_0

No generated code change.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2019-06-28 15:33:31 +10:00 • committed by Michael Ellerman
commit d7fb34c704