libgo: fix AIX build for the Go1.18 update

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/388635

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-45fd14ab8baf5e86012a808426f8ef52c1d77943
+34dece725f9f8826f4abe86209112626867bc716
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/internal/syscall/unix/ioctl_aix.go

@@ -12,7 +12,7 @@ import (
 //extern __go_ioctl_ptr
 func ioctl(int32, int32, unsafe.Pointer) int32
 
-func Ioctl(fd int, cmd int, args uintptr) (err error) {
+func Ioctl(fd int, cmd int, args unsafe.Pointer) (err error) {
 	if ioctl(int32(fd), int32(cmd), unsafe.Pointer(args)) < 0 {
 		return syscall.GetErrno()
 	}

libgo/go/os/user/listgroups_unix.go

@@ -14,7 +14,6 @@ import (
 	"io"
 	"os"
 	"strconv"
-	"syscall"
 )
 
 const groupFile = "/etc/group"

libgo/go/runtime/malloc.go

@@ -321,7 +321,7 @@ const (
 	//
 	// On other platforms, the user address space is contiguous
 	// and starts at 0, so no offset is necessary.
-	arenaBaseOffset = 0xffff800000000000*goarch.IsAmd64 + 0x0a00000000000000*goos.IsAix
+	arenaBaseOffset = 0xffff800000000000*goarch.IsAmd64 + 0x0a00000000000000*goos.IsAix*goarch.IsPpc64
 	// A typed version of this constant that will make it into DWARF (for viewcore).
 	arenaBaseOffsetUintptr = uintptr(arenaBaseOffset)
 

libgo/go/runtime/os_aix.go

@@ -7,7 +7,6 @@
 package runtime
 
 import (
-	"internal/abi"
 	"unsafe"
 )