Kernel: Add very simple BGA driver

Only thing this is currently helpful is qemu when booting with -kernel
flag as that does not provide framebuffer info in multiboot headers

kernel/include/kernel/Terminal/TTY.h

@@ -53,6 +53,8 @@ namespace Kernel
 
 		virtual bool master_has_closed() const { return false; }
 
+		virtual bool is_vtty() const { return false; }
+
 	protected:
 		TTY(termios termios, mode_t mode, uid_t uid, gid_t gid);