fix: build of talosctl on non-Linux platforms

The code from `talosctl` imports transitively tpm package, so make it
build on non-Linux.

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>

internal/pkg/tpm/tpm.go → internal/pkg/tpm/tpm_linux.go

@@ -2,6 +2,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+//go:build linux
+
 // Package tpm provides TPM 2.0 support.
 package tpm
 

internal/pkg/tpm/tpm_other.go

@@ -0,0 +1,19 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+//go:build !linux
+
+// Package tpm provides TPM 2.0 support.
+package tpm
+
+import (
+	"errors"
+
+	"github.com/google/go-tpm/tpm2/transport"
+)
+
+// Open a TPM device.
+func Open() (transport.TPMCloser, error) {
+	return nil, errors.New("TPM device is not available")
+}