[ARM] 5051/1: define pgtable_t for the !CONFIG_MMU case too

The non-MMU case also needs the type definition of pgtable_t.
So move it out of a CONFIG_MMU conditional section.
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/page.h

@@ -179,10 +179,10 @@ typedef unsigned long pgprot_t;
 
 #endif /* STRICT_MM_TYPECHECKS */
 
-typedef struct page *pgtable_t;
-
 #endif /* CONFIG_MMU */
 
+typedef struct page *pgtable_t;
+
 #include <asm/memory.h>
 
 #endif /* !__ASSEMBLY__ */