[SPARC64]: Document reserved and soft2 bits in PTE.

include/asm-sparc64/pgtable.h

@@ -114,7 +114,10 @@
 #define _PAGE_SZ8K	_AC(0x0000000000000000,UL) /* 8K Page                 */
 #define _PAGE_NFO	_AC(0x1000000000000000,UL) /* No Fault Only           */
 #define _PAGE_IE	_AC(0x0800000000000000,UL) /* Invert Endianness       */
+#define _PAGE_SOFT2	_AC(0x07FC000000000000,UL) /* Software bits, set 2    */
+#define _PAGE_RES1	_AC(0x0003000000000000,UL) /* Reserved                */
 #define _PAGE_SN	_AC(0x0000800000000000,UL) /* (Cheetah) Snoop         */
+#define _PAGE_RES2	_AC(0x0000780000000000,UL) /* Reserved                */
 #define _PAGE_PADDR_SF	_AC(0x000001FFFFFFE000,UL) /* (Spitfire) paddr [40:13]*/
 #define _PAGE_PADDR	_AC(0x000007FFFFFFE000,UL) /* (Cheetah) paddr [42:13] */
 #define _PAGE_SOFT	_AC(0x0000000000001F80,UL) /* Software bits           */