Blackfin arch: remove duplicated ANOMALY_05000448 ifdef check

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

arch/blackfin/mach-common/arch_checks.c

@@ -68,8 +68,6 @@
 # error "The kernel load address is too high; keep it below 10meg for safety"
 #endif
 
-#ifdef ANOMALY_05000448
-# if ANOMALY_05000448
-#  error You are using a part with anomaly 05000448, this issue causes random memory read/write failures - that means random crashes.
-# endif
+#if ANOMALY_05000448
+# error You are using a part with anomaly 05000448, this issue causes random memory read/write failures - that means random crashes.
 #endif