drivers/input: add export.h to symbol exporting files.

These files are not modules but are exporting symbols and/or
making use of THIS_MODULE macro.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/input/input-compat.c b/drivers/input/input-compat.c
index 1accb89..e46a867 100644
--- a/drivers/input/input-compat.c
+++ b/drivers/input/input-compat.c
@@ -8,6 +8,7 @@
  * the Free Software Foundation.
  */
 
+#include <linux/export.h>
 #include <asm/uaccess.h>
 #include "input-compat.h"