unix: add rtc defines and types

Change-Id: I280fc3b2cd3402c40f2840d152bac2fa288f48a0
Reviewed-on: https://go-review.googlesource.com/118661
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/unix/ztypes_linux_s390x.go b/unix/ztypes_linux_s390x.go
index 032a71b..55ca78c 100644
--- a/unix/ztypes_linux_s390x.go
+++ b/unix/ztypes_linux_s390x.go
@@ -1839,3 +1839,32 @@
 	NFT_NG_INCREMENTAL                = 0x0
 	NFT_NG_RANDOM                     = 0x1
 )
+
+type RTCTime struct {
+	Sec   int32
+	Min   int32
+	Hour  int32
+	Mday  int32
+	Mon   int32
+	Year  int32
+	Wday  int32
+	Yday  int32
+	Isdst int32
+}
+
+type RTCWkAlrm struct {
+	Enabled uint8
+	Pending uint8
+	_       [2]byte
+	Time    RTCTime
+}
+
+type RTCPLLInfo struct {
+	Ctrl    int32
+	Value   int32
+	Max     int32
+	Min     int32
+	Posmult int32
+	Negmult int32
+	Clock   int64
+}