sh: Reclaim beginning of P3 space for vmalloc area.

The first 1MB of P3 space was reserved and used for page colouring,
as we've reworked that to use fixmaps, we can reclaim the space and
hand it back to VMALLOC_START.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/mm/cache-sh4.c

@@ -98,9 +98,6 @@ void __init p3_cache_init(void)
 	}
 
 	emit_cache_params();
-
-	if (ioremap_page_range(P3SEG, P3SEG + (PAGE_SIZE * 4), 0, PAGE_KERNEL))
-		panic("%s failed.", __FUNCTION__);
 }
 
 /*

include/asm-sh/pgtable.h

@@ -55,11 +55,7 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
 
 #define PTE_PHYS_MASK		(0x20000000 - PAGE_SIZE)
 
-/*
- * First 1MB map is used by fixed purpose.
- * Currently only 4-entry (16kB) is used (see arch/sh/mm/cache.c)
- */
-#define VMALLOC_START	(P3SEG+0x00100000)
+#define VMALLOC_START	(P3SEG)
 #define VMALLOC_END	(FIXADDR_START-2*PAGE_SIZE)
 
 /*