Input: rohm_bu21023 - switch to using sysfs_emit()

sysfs_emit() is preferred over snprintf() for sysfs attribute handling.

Link: https://lore.kernel.org/r/20240609235134.614592-2-dmitry.torokhov@gmail.com


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