macintosh/ams: Replace snprintf in show functions with sysfs_emit

show() must not use snprintf() when formatting the value to be returned
to user space.

Fix the following coccicheck warning:
drivers/macintosh/ams/ams-core.c:53: WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <[e-mail]>
Signed-off-by: Christophe Leroy <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/macintosh/ams/ams-core.c

···
 	ams_sensors(&x, &y, &z);
 	mutex_unlock(&ams_info.lock);
 
-	return snprintf(buf, PAGE_SIZE, "%d %d %d\n", x, y, z);
+	return sysfs_emit(buf, "%d %d %d\n", x, y, z);
 }
 
 static DEVICE_ATTR(current, S_IRUGO, ams_show_current, NULL);