common/: 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/common/cmd_cache.c b/common/cmd_cache.c
index 6890faf..675d43f 100644
--- a/common/cmd_cache.c
+++ b/common/cmd_cache.c
@@ -109,4 +109,4 @@
 	"    - enable or disable data (writethrough) cache\n"
 );
 
-#endif	/* CFG_CMD_CACHE */
+#endif