smb: client: refactor cifs_revalidate_mapping() to use clear_and_wake_up_bit()

smb: client: refactor cifs_revalidate_mapping() to use clear_and_wake_up_bit()

In the `skip_invalidate:` path under `cifs_revalidate_mapping()`, the
sequence of calls:
        clear_bit_unlock();
        smp_mb__after_atomic();
        wake_up_bit();
can be replaced exactly by `clear_and_wake_up_bit()`.

The `clear_and_wake_up_bit()` helper function was introduced in
'commit 8236b0ae31c83 ("bdi: wake up concurrent wb_shutdown()
callers.")' to replace equivalent instances of this sequence of
operations. This substitution has been applied in multiple subsystems.

Compile-tested with CONFIG_CIFS=y on x86_64, no new warnings present.

Suggested-by: Agatha Isabelle Moreira <code@agatha.dev>
Link: https://kernelnewbies.org/Beginner%20Cleanup%20and%20Refactor%20Tasks%20by%20Agatha%20Isabelle%20Moreira#task_010
Cc: Agatha Isabelle Moreira <code@agatha.dev>
Signed-off-by: Mehdi Hassan <mehdi.h.business@pm.me>
Signed-off-by: Steve French <stfrench@microsoft.com>