Blackfin arch: kill ezkit548 compiling warning

kill ezkit548 compiling warning:
  - include/asm/cplb.h:42:5: warning: "ANOMALY_05000158" is not defined
Signed-off-by: NBryan Wu <bryan.wu@analog.com>

include/asm-blackfin/mach-bf548/anomaly.h

@@ -70,6 +70,7 @@
 
 /* Anomalies that don't exist on this proc */
 #define ANOMALY_05000125 (0)
+#define ANOMALY_05000158 (0)
 #define ANOMALY_05000183 (0)
 #define ANOMALY_05000198 (0)
 #define ANOMALY_05000244 (0)