devices/sensors /libsensors-spi.c: problematic use of the sprintf() function

[kemonats]

In this lines argument 3 overlaps destination object.
https://github.com/phoenix-rtos/phoenix-rtos-devices/blob/ac27d41c70aceca307401aa66047b988da6f044a/sensors/libsensors-spi.c#L110

        sprintf(dir, "%s/dir", dir);

https://github.com/phoenix-rtos/phoenix-rtos-devices/blob/ac27d41c70aceca307401aa66047b988da6f044a/sensors/libsensors-spi.c#L130

        sprintf(dir, "%s/port", dir);

Better will be use of the strcat() or strlen() + strcpy()