powerpc: move include/asm-ppc64/ppc32.h to arch/powerpc/kernel

It is only included by signal_32.c

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 444c3e8..876c57c 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -43,7 +43,7 @@
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
 #ifdef CONFIG_PPC64
-#include <asm/ppc32.h>
+#include "ppc32.h"
 #include <asm/ppcdebug.h>
 #include <asm/unistd.h>
 #include <asm/vdso.h>