Log Message:
Updated xf86-video-nv to 2.1.21.

Adam Jackson (2):
     Remove mibstore.h
     Adapt Block/WakeupHandler signature for ABI 23

Egbert Eich (1):
     init: Initialize VGA IOBase before using it

Jeremy White (1):
     Include xf86Modes.h to use functions from hw/xfree86/modes/xf86Modes.c.

Matt Turner (1):
     xf86-video-nv 2.1.21

Matthieu Herrb (1):
     Fix shadow framebuffer implementation.