Blackfin: first pass at debug mmr support

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug
index 2641731..825d59e 100644
--- a/arch/blackfin/Kconfig.debug
+++ b/arch/blackfin/Kconfig.debug
@@ -32,7 +32,7 @@
 	  Most people should say N here.
 
 config DEBUG_MMRS
-	bool "Generate Blackfin MMR tree"
+	tristate "Generate Blackfin MMR tree"
 	select DEBUG_FS
 	help
 	  Create a tree of Blackfin MMRs via the debugfs tree.  If