PM / hibernate: Add minimal noinstr annotations

When resuming there must not be any code between swsusp_arch_suspend()
and restore_processor_state() since the CPU state is ill defined at
this point in time.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Joan Bruguera <joanbrugueram@gmail.com>