unix: add taskstats enum values

I falsely assumed that enum values would be generated automatically,
but now realize that the previous values I added were actually generated
from preprocessor define statements.

This change adds some missing values I intended to add in CL 59050.

Fixes golang/go#21623.

Change-Id: I3c40c8454ee1d323e1e4e014febe0874e859a378
Reviewed-on: https://go-review.googlesource.com/59090
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/unix/ztypes_linux_ppc64le.go b/unix/ztypes_linux_ppc64le.go
index 342419d..b7d7028 100644
--- a/unix/ztypes_linux_ppc64le.go
+++ b/unix/ztypes_linux_ppc64le.go
@@ -749,3 +749,21 @@
 	Freepages_count           uint64
 	Freepages_delay_total     uint64
 }
+
+const (
+	TASKSTATS_CMD_UNSPEC                  = 0x0
+	TASKSTATS_CMD_GET                     = 0x1
+	TASKSTATS_CMD_NEW                     = 0x2
+	TASKSTATS_TYPE_UNSPEC                 = 0x0
+	TASKSTATS_TYPE_PID                    = 0x1
+	TASKSTATS_TYPE_TGID                   = 0x2
+	TASKSTATS_TYPE_STATS                  = 0x3
+	TASKSTATS_TYPE_AGGR_PID               = 0x4
+	TASKSTATS_TYPE_AGGR_TGID              = 0x5
+	TASKSTATS_TYPE_NULL                   = 0x6
+	TASKSTATS_CMD_ATTR_UNSPEC             = 0x0
+	TASKSTATS_CMD_ATTR_PID                = 0x1
+	TASKSTATS_CMD_ATTR_TGID               = 0x2
+	TASKSTATS_CMD_ATTR_REGISTER_CPUMASK   = 0x3
+	TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK = 0x4
+)