nouveau: include stdio.h where needed

Acked-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>

src/mesa/drivers/dri/nouveau/nouveau_context.c

@@ -25,6 +25,7 @@
  */
 
 #include <stdbool.h>
+#include <stdio.h>
 #include "nouveau_driver.h"
 #include "nouveau_context.h"
 #include "nouveau_bufferobj.h"

src/mesa/drivers/dri/nouveau/nouveau_driver.c

@@ -24,6 +24,7 @@
  *
  */
 
+#include <stdio.h>
 #include "main/mtypes.h"
 #include "main/fbobject.h"
 

src/mesa/drivers/dri/nouveau/nouveau_screen.c

@@ -24,6 +24,7 @@
  *
  */
 
+#include <stdio.h>
 #include <xf86drm.h>
 #include <nouveau_drm.h>
 #include "nouveau_driver.h"