m68knommu: Correct page_to_phys when PAGE_OFFSET is non-zero.

The definition of page_to_phys for nommu produces an incorrect value when
PAGE_OFFSET is non-zero.  The nommu version of page_to_pfn works correctly
for non-zero PAGE_OFFSET, so use that instead.
Signed-off-by: Steven King <sfking@fdwdc.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/include/asm/virtconvert.h

@@ -26,16 +26,12 @@ static inline void *phys_to_virt(unsigned long address)
 }
 
 /* Permanent address of a page. */
-#ifdef CONFIG_MMU
-#ifdef CONFIG_SINGLE_MEMORY_CHUNK
+#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
 #define page_to_phys(page) \
 	__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
 #else
 #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
 #endif
-#else
-#define page_to_phys(page)	(((page) - mem_map) << PAGE_SHIFT)
-#endif
 
 /*
  * IO bus memory addresses are 1:1 with the physical address,