remove ioremap_nocache and devm_ioremap_nocache

ioremap has provided non-cached semantics by default since the Linux 2.6
days, so remove the additional ioremap_nocache interface.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>

drivers/gpu/drm/tilcdc/tilcdc_drv.c

@@ -256,7 +256,7 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev)
 		goto init_failed;
 	}
 
-	priv->mmio = ioremap_nocache(res->start, resource_size(res));
+	priv->mmio = ioremap(res->start, resource_size(res));
 	if (!priv->mmio) {
 		dev_err(dev, "failed to ioremap\n");
 		ret = -ENOMEM;