USB: remove unnecessary type casting of urb->context

urb->context code cleanup

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index c60930e..c605fb6 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -945,7 +945,7 @@
 
 static void pl2303_read_int_callback(struct urb *urb)
 {
-	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+	struct usb_serial_port *port =  urb->context;
 	unsigned char *data = urb->transfer_buffer;
 	unsigned int actual_length = urb->actual_length;
 	int status = urb->status;
@@ -985,7 +985,7 @@
 
 static void pl2303_read_bulk_callback(struct urb *urb)
 {
-	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+	struct usb_serial_port *port =  urb->context;
 	struct pl2303_private *priv = usb_get_serial_port_data(port);
 	struct tty_struct *tty;
 	unsigned char *data = urb->transfer_buffer;
@@ -1068,7 +1068,7 @@
 
 static void pl2303_write_bulk_callback(struct urb *urb)
 {
-	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+	struct usb_serial_port *port =  urb->context;
 	struct pl2303_private *priv = usb_get_serial_port_data(port);
 	int result;
 	int status = urb->status;