usb: dwc2: Align size of invalidating dcache before starting DMA

During using dwc2 usb gadget, if usb message size is too small,
following cache misaligned warning is shown:

   CACHE: Misaligned operation at range [bfdbcb00, bfdbcb04]

Align size of invalidating dcache before starting DMA to remove the
warning.

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>

drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c

@@ -111,7 +111,8 @@ static int setdma_rx(struct dwc2_ep *ep, struct dwc2_request *req)
 	ctrl =  readl(&reg->out_endp[ep_num].doepctl);
 
 	invalidate_dcache_range((unsigned long) ep->dma_buf,
-				(unsigned long) ep->dma_buf + ep->len);
+				(unsigned long) ep->dma_buf +
+				ROUND(ep->len, CONFIG_SYS_CACHELINE_SIZE));
 
 	writel((unsigned int) ep->dma_buf, &reg->out_endp[ep_num].doepdma);
 	writel(DOEPT_SIZ_PKT_CNT(pktcnt) | DOEPT_SIZ_XFER_SIZE(length),