Blackfin arch: only include asm/cplb.h when it is truly used

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 9a9d508..fd24e04 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -34,6 +34,7 @@
 #include <linux/fs.h>
 #include <asm/traps.h>
 #include <asm/cacheflush.h>
+#include <asm/cplb.h>
 #include <asm/blackfin.h>
 #include <asm/irq_handler.h>
 #include <linux/irq.h>