gpu: Add export.h as required to drivers/gpu files.
They need this to get all the EXPORT_SYMBOL variants and THIS_MODULE
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 58c271e..f9cc548 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -35,6 +35,7 @@
#include <linux/file.h>
#include <linux/swap.h>
#include <linux/slab.h>
+#include <linux/export.h>
#include "drm_cache.h"
#include "drm_mem_util.h"
#include "ttm/ttm_module.h"