headers_check fix: linux/virtio_console.h

fix the following 'make headers_check' warning:

  usr/include/linux/virtio_console.h:15: found __[us]{8,16,32,64} type without #include <linux/types.h>

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>

include/linux/virtio_console.h

@@ -1,5 +1,6 @@
 #ifndef _LINUX_VIRTIO_CONSOLE_H
 #define _LINUX_VIRTIO_CONSOLE_H
+#include <linux/types.h>
 #include <linux/virtio_config.h>
 /* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
  * anyone can use the definitions to implement compatible drivers/servers. */