Blackfin: SMP: add flush_tlb_kernel_range stub

Newer code in mm/page_alloc.c requires this function now in arches.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/include/asm/tlbflush.h b/arch/blackfin/include/asm/tlbflush.h
index f1a06c0..7c36868 100644
--- a/arch/blackfin/include/asm/tlbflush.h
+++ b/arch/blackfin/include/asm/tlbflush.h
@@ -1 +1,2 @@
 #include <asm-generic/tlbflush.h>
+#define flush_tlb_kernel_range(s, e) do { } while (0)