coccinelle: atomic_as_refcounter: drop atomic_long_dec_and_lock

atomic_long_dec_and_lock() has never existed. So drop it from the rules.

No functional change.

Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>