[POWERPC] Fix ppc kernels after build-id addition

This patch fixes arch/ppc kernels, at least for prep subarch, after
build-id addition.  Without this, kernels were 3 times the size and
bootloader refused to load them.  Now they are back to normal again.

Tested only with Roland McGrath's "Use LDFLAGS_MODULE only for .ko
links" patch applied - boots and works fine.
Signed-off-by: NMeelis Roos <mroos@linux.ee>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/ppc/kernel/vmlinux.lds.S

@@ -91,6 +91,8 @@ SECTIONS
   . = ALIGN(8192);
   .data.init_task : { *(.data.init_task) }
 
+  NOTES
+
   . = ALIGN(4096);
   __init_begin = .;
   .init.text : {