crypto: omap-sham: remove the sysfs group during driver removal

The driver removal should also cleanup the created sysfs group. If not,
the driver fails the subsequent probe as the files exist already.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

drivers/crypto/omap-sham.c

@@ -2276,6 +2276,8 @@ static int omap_sham_remove(struct platform_device *pdev)
 	if (!dd->polling_mode)
 		dma_release_channel(dd->dma_lch);
 
+	sysfs_remove_group(&dd->dev->kobj, &omap_sham_attr_group);
+
 	return 0;
 }