Input: serio_raw - use guard notation for locks and other resources

Use guard notation when acquiring mutexes and spinlocks, and when
pausing and resuming serio port. Such guard notation makes the code
more compact and error handling more robust by ensuring that locks
are released in all code paths when control leaves critical section.

Link: https://lore.kernel.org/r/20240905041732.2034348-21-dmitry.torokhov@gmail.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>