This prepares *of_device_id.data becoming const. Without this change
the following warning would occur:
	drivers/mmc/host/omap_hsmmc.c: In function 'omap_hsmmc_probe':
	drivers/mmc/host/omap_hsmmc.c:1808: warning: initialization discards qualifiers from pointer target type
Acked-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
        if (match) {
                pdata = of_get_hsmmc_pdata(&pdev->dev);
                if (match->data) {
-                       u16 *offsetp = match->data;
+                       const u16 *offsetp = match->data;
                        pdata->reg_offset = *offsetp;
                }
        }