fix: tty.h not using extern "C"

include/kernel/tty.h

@@ -3,6 +3,10 @@
 
 #define STRUCT_TTY_NAME_LEN (32)
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct tty;
 
 struct tty_operations
@@ -24,3 +28,7 @@ void tty_print(struct tty* p_tty, const char* str);
 
 int make_serial_tty(struct tty* p_tty, int id);
 int make_vga_tty(struct tty* p_tty);
+
+#ifdef __cplusplus
+}
+#endif