Blackfin: add cache_dump commands

A few debug-type commands used to dump the raw icache/dcache data.  Useful
when trying to track down cache-related bugs.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/lib_blackfin/Makefile b/lib_blackfin/Makefile
index e32ecc9..4bdf6d3 100644
--- a/lib_blackfin/Makefile
+++ b/lib_blackfin/Makefile
@@ -40,6 +40,7 @@
 COBJS-y	+= boot.o
 COBJS-y	+= cache.o
 COBJS-y	+= clocks.o
+COBJS-$(CONFIG_CMD_CACHE_DUMP) += cmd_cache_dump.o
 COBJS-y	+= muldi3.o
 COBJS-$(CONFIG_POST) += post.o tests.o
 COBJS-y	+= string.o