clocksource: Convert s[n]printf() to sysfs_emit()

Per filesystems/sysfs.rst, show() should only use sysfs_emit() or
sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

Signed-off-by: Li Zhijian <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: zhijianli88

kernel/time/clocksource.c

@@ -1334,7 +1334,7 @@ static ssize_t current_clocksource_show(struct device *dev,
 	ssize_t count = 0;
 
 	mutex_lock(&clocksource_mutex);
-	count = snprintf(buf, PAGE_SIZE, "%s\n", curr_clocksource->name);
+	count = sysfs_emit(buf, "%s\n", curr_clocksource->name);
 	mutex_unlock(&clocksource_mutex);
 
 	return count;