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_fat.c

@@ -324,4 +324,4 @@ void hexdump (int cnt, unsigned char *data)
 }
 #endif	/* NOT_IMPLEMENTED_YET */
 
-#endif	/* CFG_CMD_FAT */
+#endif