[BNX2]: Enable DMA on 5709.

Add missing code to enable DMA on 5709 A1.  The bit is a no-op on A0
and therefore can be set on all 5709 chips.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index bd6288d..49a5de2 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -1373,6 +1373,7 @@
 #define BNX2_MISC_NEW_CORE_CTL				0x000008c8
 #define BNX2_MISC_NEW_CORE_CTL_LINK_HOLDOFF_SUCCESS	 (1L<<0)
 #define BNX2_MISC_NEW_CORE_CTL_LINK_HOLDOFF_REQ		 (1L<<1)
+#define BNX2_MISC_NEW_CORE_CTL_DMA_ENABLE		 (1L<<16)
 #define BNX2_MISC_NEW_CORE_CTL_RESERVED_CMN		 (0x3fffL<<2)
 #define BNX2_MISC_NEW_CORE_CTL_RESERVED_TC		 (0xffffL<<16)