rtc: x1205: use sysfs_emit() instead of sprintf()

Use sysfs_emit() instead of sprintf() in sysfs show callbacks
(x1205_sysfs_show_atrim and x1205_sysfs_show_dtrim) to conform to the
recommended sysfs attribute formatting guidelines in
Documentation/filesystems/sysfs.rst.

Link: https://patch.msgid.link/20261029132339.925021-5-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>