[MIPS] Remove LIMITED_DMA support

This code was needed only by Jaguar ATX.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mm/init.c

@@ -424,9 +424,6 @@ void __init mem_init(void)
 			continue;
 		}
 		ClearPageReserved(page);
-#ifdef CONFIG_LIMITED_DMA
-		set_page_address(page, lowmem_page_address(page));
-#endif
 		init_page_count(page);
 		__free_page(page);
 		totalhigh_pages++;