remove _IO_BASE and KSEG1ADDR from board configuration files

The KSEG1ADDR macro used to be necessary for the RTL8139 Ethernet
driver, but the code that used that macro was removed over a year
ago, so board configuration files no longer need to define it.

The _IO_BASE macro is also automatically defined to 0 if it isn't
already set, so there's no need to define that macro either in the
board configuration files.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Acked-by: Andy Fleming <afleming@freescale.com>
Acked-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/include/configs/HIDDEN_DRAGON.h b/include/configs/HIDDEN_DRAGON.h
index f6777b9..251fe67 100644
--- a/include/configs/HIDDEN_DRAGON.h
+++ b/include/configs/HIDDEN_DRAGON.h
@@ -103,9 +103,7 @@
 #define PCI_ENET1_MEMADDR	0x81000000
 
 #define CONFIG_RTL8139
-#define _IO_BASE	    0x00000000
-/* This macro is used by RTL8139 but not defined in PPC architecture */
-#define KSEG1ADDR(x)	    (x)
+
 /* Make sure the ethaddr can be overwritten
    TODO: Remove this on final product
 */