powerpc/64s/exception: use a gas macro for system call handler code

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 2019-06-22 23:15:31 +10:00 • committed by Michael Ellerman
commit 1b4d4a7933