usb: gadget: renesas_usbhs: fix compile warning

| drivers/usb/renesas_usbhs/fifo.c: In function ‘usbhsf_dma_prepare_push’:
| drivers/usb/renesas_usbhs/fifo.c:823:7: warning: cast from pointer \
	to integer of different size [-Wpointer-to-int-cast]
| drivers/usb/renesas_usbhs/fifo.c: In function ‘usbhsf_dma_try_pop’:
| drivers/usb/renesas_usbhs/fifo.c:900:7: warning: cast from pointer \
	to integer of different size [-Wpointer-to-int-cast]

Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 16b12b0..762b742 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -820,7 +820,7 @@
 	if (len % 4) /* 32bit alignment */
 		goto usbhsf_pio_prepare_push;
 
-	if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
+	if ((*(u32 *) pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
 		goto usbhsf_pio_prepare_push;
 
 	/* get enable DMA fifo */
@@ -897,7 +897,7 @@
 	if (!fifo)
 		goto usbhsf_pio_prepare_pop;
 
-	if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
+	if ((*(u32 *) pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
 		goto usbhsf_pio_prepare_pop;
 
 	ret = usbhsf_fifo_select(pipe, fifo, 0);