Use sysfs_emit() instead of directly call sprintf().
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240214-axi-fan-control-no-of-v1-2-43ca656fe2e3@analog.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>