udc: lpc32xx: make symbol 'lpc32xx_usbddata' static

The sparse tool complains as follows:

drivers/usb/gadget/udc/lpc32xx_udc.c:2989:25: warning:
 symbol 'lpc32xx_usbddata' was not declared. Should it be static?

This variable is not used outside of lpc32xx_udc.c, so this commit
marks it static.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20200707105350.7064-1-weiyongjun1@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/lpc32xx_udc.c

@@ -2986,7 +2986,7 @@ static void lpc32xx_rmwkup_chg(int remote_wakup_enable)
 	/* Enable or disable USB remote wakeup */
 }
 
-struct lpc32xx_usbd_cfg lpc32xx_usbddata = {
+static struct lpc32xx_usbd_cfg lpc32xx_usbddata = {
 	.vbus_drv_pol = 0,
 	.conn_chgb = &lpc32xx_usbd_conn_chg,
 	.susp_chgb = &lpc32xx_usbd_susp_chg,