powerpc/sparse: Add more assembler prototypes

Another set of things that are only called from assembler and so need
prototypes to keep sparse happy.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index bf91658..2299bf6 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -39,6 +39,7 @@
 #include <asm/pgtable.h>
 #include <asm/switch_to.h>
 #include <asm/tm.h>
+#include <asm/asm-prototypes.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/syscalls.h>