Input: synaptics-rmi4 - switch to using cleanup functions in F34

Start using __free() and guard() primitives to simplify the code
and error handling.

Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/Zxwd9c0njasZZoal@google.com


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