USB: oti6858: declare send_data() as static

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index deeacde..525d852 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -295,7 +295,7 @@
 	}
 }
 
-void send_data(struct work_struct *work)
+static void send_data(struct work_struct *work)
 {
 	struct oti6858_private *priv = container_of(work,
 			struct oti6858_private, delayed_write_work.work);