[Blackfin] arch: define our own BUG() so we can dump the blackfin hardware trace buffer

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

include/asm-blackfin/bug.h

 #ifndef _BLACKFIN_BUG_H
 #define _BLACKFIN_BUG_H
+
+#ifdef CONFIG_BUG
+#define HAVE_ARCH_BUG
+
+#define BUG() do { \
+	dump_bfin_trace_buffer(); \
+	printk(KERN_EMERG "BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
+	panic("BUG!"); \
+} while (0)
+
+#endif
+
 #include <asm-generic/bug.h>
+
 #endif