syscall: correct TCGETS/TCSETS values on ppc64/ppc64le

Correcting values is allowed per the syscall package rules, so update
these constants to their correct value on ppc64/ppc64le. The values now
match the corresponding constants in x/sys/unix.

Update #19560
Fixes #22000

Change-Id: I1d358de345766ec96e15dfcc8911fe2f39fb0ddb
Reviewed-on: https://go-review.googlesource.com/66510
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/syscall/ztypes_linux_ppc64.go

@@ -600,7 +600,7 @@ type Termios struct {
 const (
 	IUCLC  = 0x1000
 	OLCUC  = 0x4
-	TCGETS = 0x403c7413
-	TCSETS = 0x803c7414
+	TCGETS = 0x402c7413
+	TCSETS = 0x802c7414
 	XCASE  = 0x4000
 )

src/syscall/ztypes_linux_ppc64le.go

@@ -600,7 +600,7 @@ type Termios struct {
 const (
 	IUCLC  = 0x1000
 	OLCUC  = 0x4
-	TCGETS = 0x403c7413
-	TCSETS = 0x803c7414
+	TCGETS = 0x402c7413
+	TCSETS = 0x802c7414
 	XCASE  = 0x4000
 )