drivers/misc: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required.

We will need this to avoid build failures pending a future implicit
module.h presence cleanup.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index a844810..4bcfc37 100644
--- a/drivers/misc/atmel_tclib.c
+++ b/drivers/misc/atmel_tclib.c
@@ -7,6 +7,7 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <linux/export.h>
 
 /* Number of bytes to reserve for the iomem resource */
 #define ATMEL_TC_IOMEM_SIZE	256