i386: pfn_valid

The definition for CONFIG_FLATMEM is already provided so we can remove
the statements for i386.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.18-mm3/include/asm-i386/page.h
===================================================================
--- linux-2.6.18-mm3.orig/include/asm-i386/page.h	2006-10-04 01:48:13.450062895 -0500
+++ linux-2.6.18-mm3/include/asm-i386/page.h	2006-10-04 03:06:35.042743922 -0500
@@ -126,9 +126,6 @@ extern int page_is_ram(unsigned long pag
 #define __pa(x)			((unsigned long)(x)-PAGE_OFFSET)
 #define __va(x)			((void *)((unsigned long)(x)+PAGE_OFFSET))
 #define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
-#ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
-#endif /* CONFIG_FLATMEM */
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)