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>

common/cmd_dcr.c

@@ -246,4 +246,4 @@ U_BOOT_CMD(
 	"adr_dcrn[.dat_dcrn] offset value - write offset to adr_dcrn, write value to dat_dcrn.\n"
 );
 
-#endif /* CONFIG_4xx & CFG_CMD_SETGETDCR */
+#endif