fix offsets in kernel-arm64.patch which were preventing it applying properly

it was missing the final hunk in arch/arm64/kernel/setup.c, which probably
means there's a nasty bug in patch in f21 and elsewhere... :/

(the second to last hunk on that file had fuzz due to the original offsets,
 fixing that applies the final hunk.)

kernel-arm64.patch

@@ -4528,7 +4528,7 @@ index 2437196..914287d 100644
  	parse_early_param();
  
  	/*
-@@ -389,19 +398,27 @@ void __init setup_arch(char **cmdline_p)
+@@ -397,20 +397,28 @@ void __init setup_arch(char **cmdline_p)
  	efi_init();
  	arm64_memblock_init();