Blackfin arch: Fix typo. it should be _outsw_8

Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/lib/outs.S b/arch/blackfin/lib/outs.S
index 3daf960..4685b7a 100644
--- a/arch/blackfin/lib/outs.S
+++ b/arch/blackfin/lib/outs.S
@@ -76,4 +76,4 @@
 		R0 = R0 + R1;
 .Lword8_loop_e: W[P0] = R0;
 	RTS;
-ENDPROC(_outsw)
+ENDPROC(_outsw_8)