[Blackfin] arch: fix up - CONFIG_BLKFIN_WT was renamed CONFIG_BFIN_WT while the MPU code was out-of-tree.

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

diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinit.c b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
index dc6e8a7..7310e5f 100644
--- a/arch/blackfin/kernel/cplb-mpu/cplbinit.c
+++ b/arch/blackfin/kernel/cplb-mpu/cplbinit.c
@@ -49,7 +49,7 @@
 
 #ifdef CONFIG_BFIN_DCACHE
 	d_cache = CPLB_L1_CHBL;
-#ifdef CONFIG_BLKFIN_WT
+#ifdef CONFIG_BFIN_WT
 	d_cache |= CPLB_L1_AOW | CPLB_WT;
 #endif
 #endif