fs: Kconfig: Add a separate option for FS_JFFS2

Rather than using CMD_JFFS2 for both the filesystem and its command, we
should have a separate option for each. This allows us to enable JFFS2
support without the command, if desired, which reduces U-Boot's size
slightly.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/cramfs.c b/cmd/cramfs.c
index 4e75de8..49ee36c 100644
--- a/cmd/cramfs.c
+++ b/cmd/cramfs.c
@@ -39,7 +39,7 @@
 # define OFFSET_ADJUSTMENT	(flash_info[id.num].start[0])
 #endif
 
-#ifndef CONFIG_CMD_JFFS2
+#ifndef CONFIG_FS_JFFS2
 #include <linux/stat.h>
 char *mkmodestr(unsigned long mode, char *str)
 {
@@ -70,7 +70,7 @@
 	str[10] = '\0';
 	return str;
 }
-#endif /* CONFIG_CMD_JFFS2 */
+#endif /* CONFIG_FS_JFFS2 */
 
 extern int cramfs_check (struct part_info *info);
 extern int cramfs_load (char *loadoffset, struct part_info *info, char *filename);