[IA64] Enable bpf syscall for ia64

See commit 99c55f7d47c0dc6fc64729f37bf435abf43f4c60
   bpf: introduce BPF syscall and maps

Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/include/uapi/asm/unistd.h b/arch/ia64/include/uapi/asm/unistd.h
index 18026b2..4c2240c 100644
--- a/arch/ia64/include/uapi/asm/unistd.h
+++ b/arch/ia64/include/uapi/asm/unistd.h
@@ -330,5 +330,6 @@
 #define __NR_renameat2			1338
 #define __NR_getrandom			1339
 #define __NR_memfd_create		1340
+#define __NR_bpf			1341
 
 #endif /* _UAPI_ASM_IA64_UNISTD_H */