[Blackfin] arch: Consistently export base_addr for all Blackfin variants.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/mach-bf537/dma.c b/arch/blackfin/mach-bf537/dma.c
index 706cb97..992b19f 100644
--- a/arch/blackfin/mach-bf537/dma.c
+++ b/arch/blackfin/mach-bf537/dma.c
@@ -26,6 +26,8 @@
  * to the Free Software Foundation, Inc.,
  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
+#include <linux/module.h>
+
 #include <asm/blackfin.h>
 #include <asm/dma.h>
 
@@ -47,6 +49,7 @@
 	(struct dma_register *) MDMA_D1_NEXT_DESC_PTR,
 	(struct dma_register *) MDMA_S1_NEXT_DESC_PTR,
 };
+EXPORT_SYMBOL(base_addr);
 
 int channel2irq(unsigned int channel)
 {