[ARM] 5271/1: get rid of pages_to_mb()

There is no use of this in the whole tree.
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/pgtable.h

@@ -319,11 +319,6 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
 
 #define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd)))
 
-/*
- * Permanent address of a page. We never have highmem, so this is trivial.
- */
-#define pages_to_mb(x)		((x) >> (20 - PAGE_SHIFT))
-
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.