staging: octeon-usb: remove unnecessary variable frame_number

Remove unnecessary local variable "frame_number" and its assignments from function
cvmx_usb_get_frame_numbe. Suggested by Coccinelle.
Signed-off-by: Himadri Pandya <himadri18.07@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon-usb/octeon-hcd.c

@@ -2385,13 +2385,11 @@ static int cvmx_usb_close_pipe(struct octeon_hcd *usb,
  */
 static int cvmx_usb_get_frame_number(struct octeon_hcd *usb)
 {
-	int frame_number;
 	union cvmx_usbcx_hfnum usbc_hfnum;
 
 	usbc_hfnum.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
-	frame_number = usbc_hfnum.s.frnum;
 
-	return frame_number;
+	return usbc_hfnum.s.frnum;
 }
 
 static void cvmx_usb_transfer_control(struct octeon_hcd *usb,