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_mii.c b/common/cmd_mii.c
index 120b8e8..f6b98d1 100644
--- a/common/cmd_mii.c
+++ b/common/cmd_mii.c
@@ -595,4 +595,4 @@
 
 #endif /* CONFIG_TERSE_MII */
 
-#endif /* CFG_CMD_MII */
+#endif