drm/omap: Use correct printk format specifiers for size_t

The correct format specifier for size_t is %zu. Using %d (or %u)
generates a warning on 64-bit platforms. Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

drivers/gpu/drm/omapdrm/dss/dsi.c

@@ -2094,7 +2094,7 @@ static int dsi_vc_send_long(struct dsi_data *dsi, int vc,
 	u8 b1, b2, b3, b4;
 
 	if (dsi->debug_write)
-		DSSDBG("dsi_vc_send_long, %d bytes\n", msg->tx_len);
+		DSSDBG("dsi_vc_send_long, %zu bytes\n", msg->tx_len);
 
 	/* len + header */
 	if (dsi->vc[vc].tx_fifo_size * 32 * 4 < msg->tx_len + 4) {
@@ -2390,7 +2390,7 @@ static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int vc,
 
 	return 0;
 err:
-	DSSERR("%s(vc %d, reqlen %d) failed\n", __func__,  vc, msg->tx_len);
+	DSSERR("%s(vc %d, reqlen %zu) failed\n", __func__,  vc, msg->tx_len);
 	return r;
 }