unicore32: drop pte_file()-related helpers

We've replaced remap_file_pages(2) implementation with emulation.  Nobody
creates non-linear mapping anymore.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/unicore32/include/asm/pgtable-hwdef.h

@@ -44,7 +44,6 @@
 #define PTE_TYPE_INVALID	(3 << 0)
 
 #define PTE_PRESENT		(1 << 2)
-#define PTE_FILE		(1 << 3)	/* only when !PRESENT */
 #define PTE_YOUNG		(1 << 3)
 #define PTE_DIRTY		(1 << 4)
 #define PTE_CACHEABLE		(1 << 5)

arch/unicore32/include/asm/pgtable.h

@@ -283,20 +283,6 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 #define MAX_SWAPFILES_CHECK()	\
 	BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS)
 
-/*
- * Encode and decode a file entry.  File entries are stored in the Linux
- * page tables as follows:
- *
- *   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
- *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
- *   <----------------------- offset ----------------------> 1 0 0 0
- */
-#define pte_file(pte)		(pte_val(pte) & PTE_FILE)
-#define pte_to_pgoff(x)		(pte_val(x) >> 4)
-#define pgoff_to_pte(x)		__pte(((x) << 4) | PTE_FILE)
-
-#define PTE_FILE_MAX_BITS	28
-
 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 /* FIXME: this is not correct */
 #define kern_addr_valid(addr)	(1)