sh: Kill off the special uncached section and fixmap.

Now that cached_to_uncached works as advertized in 32-bit mode and we're
never going to be able to map < 16MB anyways, there's no need for the
special uncached section. Kill it off.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/mm/init.c

@@ -211,9 +211,6 @@ void __init paging_init(void)
 	}
 
 	free_area_init_nodes(max_zone_pfns);
-
-	/* Set up the uncached fixmap */
-	set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start));
 }
 
 /*