Kernel: Move TYPEDEF_* TTY macros to API/ttydefaults.h file

This allows us to get rid of an include to LibC/sys/ttydefaults.h in the
Kernel TTY implementation.

Also, move ttydefchars static const struct to another file called
Kernel/API/ttydefaultschars.h, so it could be used too in the Kernel TTY
implementation without the need to include anything from LibC.

Kernel/API/ttydefaultschars.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2021, Daniel Bertalan <dani@danielbertalan.dev>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <Kernel/API/POSIX/termios.h>
+#include <Kernel/API/ttydefaults.h>
+
+#ifdef __clang__
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wc99-designator"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static const cc_t ttydefchars[NCCS] = {
+    [VINTR] = CINTR,
+    [VQUIT] = CQUIT,
+    [VERASE] = CERASE,
+    [VKILL] = CKILL,
+    [VEOF] = CEOF,
+    [VTIME] = CTIME,
+    [VMIN] = CMIN,
+    [VSWTC] = CSWTC,
+    [VSTART] = CSTART,
+    [VSTOP] = CSTOP,
+    [VSUSP] = CSUSP,
+    [VEOL] = CEOL,
+    [VREPRINT] = CREPRINT,
+    [VDISCARD] = CDISCARD,
+    [VWERASE] = CWERASE,
+    [VLNEXT] = CLNEXT,
+    [VEOL2] = CEOL2
+};
+
+#ifdef __clang__
+#    pragma clang diagnostic pop
+#endif
+
+#ifdef __cplusplus
+}
+#endif