Input: tsc2004/5 - use guard notation when acquiring mutexes/locks

This makes the code more compact and error handling more robust.

Link: https://lore.kernel.org/r/20240711172719.1248373-6-dmitry.torokhov@gmail.com


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