disk/ doc/ lib_*/ and tools/: Remove lingering references to CFG_CMD_* symbols.

Fixed some broken instances of "#ifdef CMD_CFG_IDE" too.
Those always evaluated TRUE, and thus were always compiled
even when IDE really wasn't defined/wanted.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/doc/README.JFFS2 b/doc/README.JFFS2
index 270da90..c5d67fd 100644
--- a/doc/README.JFFS2
+++ b/doc/README.JFFS2
@@ -2,7 +2,7 @@
 -----------------------
 
 JFFS2 in U-Boot is a read only implementation of the file system in
-Linux with the same name. To use JFFS2 define CFG_CMD_JFFS2.
+Linux with the same name. To use JFFS2 define CONFIG_CMD_JFFS2.
 
 The module adds three new commands.
 fsload  - load binary file from a file system image