crypto/elliptic/internal/nistec: move to crypto/internal/nistec

So it's reachable from crypto/ecdsa and the upcoming crypto/ecdh.

No code changes.

For #52182

Change-Id: Ie3216052f46c6ef7ec64d8b87a233a9c50c4b16a
Reviewed-on: https://go-review.googlesource.com/c/go/+/398674
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>

src/cmd/compile/internal/ssa/stmtlines_test.go

@@ -89,7 +89,7 @@ func TestStmtLines(t *testing.T) {
 		if pkgname == "runtime" {
 			continue
 		}
-		if pkgname == "crypto/elliptic/internal/fiat" {
+		if pkgname == "crypto/internal/nistec/fiat" {
 			continue // golang.org/issue/49372
 		}
 		if e.Val(dwarf.AttrStmtList) == nil {

src/crypto/elliptic/nistec.go

@@ -5,7 +5,7 @@
 package elliptic
 
 import (
-	"crypto/elliptic/internal/nistec"
+	"crypto/internal/nistec"
 	"errors"
 	"math/big"
 )

src/crypto/elliptic/nistec_p256.go

@@ -7,7 +7,7 @@
 package elliptic
 
 import (
-	"crypto/elliptic/internal/nistec"
+	"crypto/internal/nistec"
 	"math/big"
 )
 

src/crypto/internal/nistec/fiat/fiat_test.go

@@ -5,7 +5,7 @@
 package fiat_test
 
 import (
-	"crypto/elliptic/internal/fiat"
+	"crypto/internal/nistec/fiat"
 	"testing"
 )
 

src/crypto/internal/nistec/generate.go

@@ -151,7 +151,7 @@ const tmplNISTEC = `// Copyright 2022 The Go Authors. All rights reserved.
 package nistec
 
 import (
-	"crypto/elliptic/internal/fiat"
+	"crypto/internal/nistec/fiat"
 	"crypto/subtle"
 	"errors"
 	"sync"

src/crypto/internal/nistec/nistec_test.go

@@ -7,7 +7,7 @@ package nistec_test
 import (
 	"bytes"
 	"crypto/elliptic"
-	"crypto/elliptic/internal/nistec"
+	"crypto/internal/nistec"
 	"math/big"
 	"math/rand"
 	"os"

src/crypto/internal/nistec/p224.go

@@ -7,7 +7,7 @@
 package nistec
 
 import (
-	"crypto/elliptic/internal/fiat"
+	"crypto/internal/nistec/fiat"
 	"crypto/subtle"
 	"errors"
 	"sync"

src/crypto/internal/nistec/p224_sqrt.go

@@ -5,7 +5,7 @@
 package nistec
 
 import (
-	"crypto/elliptic/internal/fiat"
+	"crypto/internal/nistec/fiat"
 	"sync"
 )
 

src/crypto/internal/nistec/p256.go

@@ -9,7 +9,7 @@
 package nistec
 
 import (
-	"crypto/elliptic/internal/fiat"
+	"crypto/internal/nistec/fiat"
 	"crypto/subtle"
 	"errors"
 	"sync"

src/crypto/internal/nistec/p256_asm_test.go

@@ -9,7 +9,7 @@ package nistec_test
 import (
 	"bytes"
 	"crypto/elliptic"
-	"crypto/elliptic/internal/nistec"
+	"crypto/internal/nistec"
 	"math/big"
 	"testing"
 )

src/crypto/internal/nistec/p384.go

@@ -7,7 +7,7 @@
 package nistec
 
 import (
-	"crypto/elliptic/internal/fiat"
+	"crypto/internal/nistec/fiat"
 	"crypto/subtle"
 	"errors"
 	"sync"

src/crypto/internal/nistec/p521.go

@@ -7,7 +7,7 @@
 package nistec
 
 import (
-	"crypto/elliptic/internal/fiat"
+	"crypto/internal/nistec/fiat"
 	"crypto/subtle"
 	"errors"
 	"sync"

src/go/build/deps_test.go

@@ -406,8 +406,8 @@ var depsRules = `
 	< crypto
 	< crypto/subtle
 	< crypto/internal/subtle
-	< crypto/elliptic/internal/fiat
-	< crypto/elliptic/internal/nistec
+	< crypto/internal/nistec/fiat
+	< crypto/internal/nistec
 	< crypto/ed25519/internal/edwards25519/field, golang.org/x/crypto/curve25519/internal/field
 	< crypto/ed25519/internal/edwards25519
 	< crypto/cipher