[IA64] wire up preadv/pwritev system calls

Gerd Hoffmann added these to Linux.  Let ia64 use them.
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/include/asm/unistd.h

@@ -308,11 +308,13 @@
 #define __NR_dup3			1316
 #define __NR_pipe2			1317
 #define __NR_inotify_init1		1318
+#define __NR_preadv			1319
+#define __NR_pwritev			1320
 
 #ifdef __KERNEL__
 
 
-#define NR_syscalls			295 /* length of syscall table */
+#define NR_syscalls			297 /* length of syscall table */
 
 /*
  * The following defines stop scripts/checksyscalls.sh from complaining about

arch/ia64/kernel/entry.S

@@ -1803,6 +1803,8 @@ sys_call_table:
 	data8 sys_dup3
 	data8 sys_pipe2
 	data8 sys_inotify_init1
+	data8 sys_preadv
+	data8 sys_pwritev			// 1320
 
 	.org sys_call_table + 8*NR_syscalls	// guard against failures to increase NR_syscalls
 #endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */