spinlock: extend guard with spinlock_bh variants

Extend guard APIs with missing raw/spinlock_bh variants.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>