powerpc/nohash: Update 64K nohash config to have 32 pte fragement

They don't need to track 4k subpage slot details and hence don't need
second half of pgtable_t.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/nohash/64/pgtable-64k.h

@@ -10,14 +10,14 @@
 #define PGD_INDEX_SIZE  12
 
 /*
- * we support 16 fragments per PTE page of 64K size.
+ * we support 32 fragments per PTE page of 64K size
  */
-#define PTE_FRAG_NR	16
+#define PTE_FRAG_NR	32
 /*
  * We use a 2K PTE page fragment and another 2K for storing
  * real_pte_t hash index
  */
-#define PTE_FRAG_SIZE_SHIFT  12
+#define PTE_FRAG_SIZE_SHIFT  11
 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
 
 #ifndef __ASSEMBLY__