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>
diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
index 59b2309..90c6d4a 100644
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -43,7 +43,7 @@ __iomem void *plat_of_remap_node(const char *node)
 				res.name))
 		panic("Failed to request resources for %s", node);
 
-	return ioremap_nocache(res.start, resource_size(&res));
+	return ioremap(res.start, resource_size(&res));
 }
 
 void __init device_tree_init(void)