drv_rc_input: replace useless rc_input_values define

src/drivers/drv_rc_input.h

src/drivers/px4io/px4io.cpp

src/modules/mavlink/mavlink_messages.cpp

src/modules/mavlink/mavlink_receiver.cpp

src/modules/sensors/parameters.h

src/modules/sensors/rc_update.cpp

src/modules/simulator/simulator.h

src/modules/simulator/simulator_mavlink.cpp

src/modules/syslink/syslink_main.cpp

src/systemcmds/tests/test_ppm_loopback.c

src/systemcmds/tests/test_rc.c