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/lib_m68k/board.c b/lib_m68k/board.c
index b7e76b8..293fd04 100644
--- a/lib_m68k/board.c
+++ b/lib_m68k/board.c
@@ -624,7 +624,7 @@
 	if ((s = getenv ("bootfile")) != NULL) {
 		copy_filename (BootFile, s, sizeof (BootFile));
 	}
-#endif /* CFG_CMD_NET */
+#endif
 
 	WATCHDOG_RESET ();