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/kgdb.c b/common/kgdb.c
index 747a5b1..1d34669 100644
--- a/common/kgdb.c
+++ b/common/kgdb.c
@@ -591,4 +591,4 @@
 
 int kgdb_not_configured = 1;
 
-#endif /* CFG_CMD_KGDB */
+#endif