blackfin: Add export.h to files using EXPORT_SYMBOL/THIS_MODULE

These particular files were just assuming that module.h was
somehow in the include paths.  Give them the more minimalist
header file explicitly.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/arch/blackfin/mach-bf527/boards/ezbrd.c b/arch/blackfin/mach-bf527/boards/ezbrd.c
index 6dbb1b4..64f7278 100644
--- a/arch/blackfin/mach-bf527/boards/ezbrd.c
+++ b/arch/blackfin/mach-bf527/boards/ezbrd.c
@@ -674,6 +674,7 @@
 #if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
+#include <linux/export.h>
 
 static struct gpio_keys_button bfin_gpio_keys_table[] = {
 	{BTN_0, GPIO_PG0, 1, "gpio-keys: BTN0"},