cramfs: Fix ifdef

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

fs/cramfs/uncompress.c

@@ -25,7 +25,7 @@
 #include <watchdog.h>
 #include <zlib.h>
 
-#if defined(CONFIG_CMD_JFFS2)
+#if defined(CONFIG_CMD_CRAMFS)
 
 static z_stream stream;