cmd/go: enable TestNoteReading on ppc64le

This test was previously disabled when external linking was
unsupported on ppc64le. It should still be disabled on ppc64
since there is no cgo or external linking there, but I removed
the if test for GOARCH=ppc64 since the initial test for cgo
enabled will cause it to be skipped on ppc64.

Fixes #22360

Change-Id: I5a0e3e4a1bd71ac7bf0ed0c792f7b78fb4a5e100
Reviewed-on: https://go-review.googlesource.com/73510
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/cmd/go/note_test.go

@@ -32,8 +32,6 @@ func TestNoteReading(t *testing.T) {
 	switch {
 	case !build.Default.CgoEnabled:
 		t.Skipf("skipping - no cgo, so assuming external linking not available")
-	case runtime.GOOS == "linux" && (runtime.GOARCH == "ppc64le" || runtime.GOARCH == "ppc64"):
-		t.Skipf("skipping - external linking not supported, golang.org/issue/11184")
 	case runtime.GOOS == "openbsd" && runtime.GOARCH == "arm":
 		t.Skipf("skipping - external linking not supported, golang.org/issue/10619")
 	case runtime.GOOS == "plan9":