powerpc: get rid of PMD_PAGE_SIZE() and _PMD_SIZE

PMD_PAGE_SIZE() is nowhere used and _PMD_SIZE is only
used by PMD_PAGE_SIZE().

This patch removes them.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/nohash/32/pte-40x.h

@@ -52,12 +52,9 @@
 
 #define _PMD_PRESENT	0x400	/* PMD points to page of PTEs */
 #define _PMD_BAD	0x802
-#define _PMD_SIZE	0x0e0	/* size field, != 0 for large-page PMD entry */
 #define _PMD_SIZE_4M	0x0c0
 #define _PMD_SIZE_16M	0x0e0
 
-#define PMD_PAGE_SIZE(pmdval)	(1024 << (((pmdval) & _PMD_SIZE) >> 4))
-
 /* Until my rework is finished, 40x still needs atomic PTE updates */
 #define PTE_ATOMIC_UPDATES	1
 

arch/powerpc/include/asm/pte-common.h

@@ -60,10 +60,6 @@
 #ifndef _PMD_PRESENT_MASK
 #define _PMD_PRESENT_MASK	_PMD_PRESENT
 #endif
-#ifndef _PMD_SIZE
-#define _PMD_SIZE	0
-#define PMD_PAGE_SIZE(pmd)	bad_call_to_PMD_PAGE_SIZE()
-#endif
 #ifndef _PMD_USER
 #define _PMD_USER	0
 #endif
@@ -88,11 +84,7 @@
 #define _PTE_NONE_MASK	_PAGE_HPTEFLAGS
 #endif
 
-/* Make sure we get a link error if PMD_PAGE_SIZE is ever called on a
- * kernel without large page PMD support
- */
 #ifndef __ASSEMBLY__
-extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
 
 /*
  * Don't just check for any non zero bits in __PAGE_USER, since for book3e