USB: usbsevseg: convert sysfs snprintf to sysfs_emit

Fix the following coccincheck warning:
drivers/usb/misc/usbsevseg.c:170:8-16:
WARNING: use scnprintf or sprintf

Signed-off-by: Xuezhi Zhang <zhangxuezhi1@coolpad.com>
Link: https://lore.kernel.org/r/20220727124415.8340-1-zhangxuezhi3@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/usbsevseg.c

diff --git a/drivers/usb/misc/usbsevseg.c b/drivers/usb/misc/usbsevseg.c
index 4bc816b..c3114d9 100644
--- a/drivers/usb/misc/usbsevseg.c
+++ b/drivers/usb/misc/usbsevseg.c
@@ -167,7 +167,7 @@ static ssize_t text_show(struct device *dev,
 	struct usb_interface *intf = to_usb_interface(dev);
 	struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
 
-	return snprintf(buf, mydev->textlength, "%s\n", mydev->text);
+	return sysfs_emit(buf, "%s\n", mydev->text);
 }
 
 static ssize_t text_store(struct device *dev,