powerpc/32: use patch_site_addr() in machine_init()

Use patch_site_addr() instead of hardcoding the
address calculation in machine_init()
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/setup_32.c

@@ -101,8 +101,7 @@ notrace unsigned long __init early_init(unsigned long dt_ptr)
  */
 notrace void __init machine_init(u64 dt_ptr)
 {
-	unsigned int *addr = (unsigned int *)((unsigned long)&patch__memset_nocache +
-					       patch__memset_nocache);
+	unsigned int *addr = (unsigned int *)patch_site_addr(&patch__memset_nocache);
 	unsigned long insn;
 
 	/* Configure static keys first, now that we're relocated. */