staging: olpc_dcon: remove pointless debug printk in dcon_freeze_store()

This printk doesn't really add anything worthwhile.
Signed-off-by: Shurong Zhang <zhang_shurong@foxmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/olpc_dcon/olpc_dcon.c

@@ -456,8 +456,6 @@ static ssize_t dcon_freeze_store(struct device *dev,
 	if (ret)
 		return ret;
 
-	pr_info("dcon_freeze_store: %lu\n", output);
-
 	switch (output) {
 	case 0:
 		dcon_set_source(dcon, DCON_SOURCE_CPU);