Kernel: Make TTY write lock a spinlock

I don't really like this but its needed with the current architecture to
allow printing while interrupts are disabled. I was hitting a dead lock
on few real machines

kernel/include/kernel/Terminal/TTY.h

@@ -100,9 +100,9 @@ namespace Kernel
 		termios m_termios;
 
 	protected:
-		Mutex m_mutex;
+		Mutex m_input_mutex;
 
-		Mutex m_write_lock;
+		RecursiveSpinLock m_write_lock;
 		ThreadBlocker m_write_blocker;
 	};
 

kernel/include/kernel/Terminal/VirtualTTY.h

@@ -21,6 +21,8 @@ namespace Kernel
 
 		void clear() override;
 
+		BAN::ErrorOr<void> set_terminal_driver(BAN::RefPtr<TerminalDriver>);
+
 	protected:
 		BAN::StringView name() const override { return m_name; }
 		bool putchar_impl(uint8_t ch) override;