Convert DM9000 driver for CONFIG_NET_MULTI

All drivers need to be converted to CONFIG_NET_MULTI.
This patch converts the dm9000 driver.

Signed-off-by: Thomas Smits <ts.smits@gmail.com>
Signed-off-by: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/include/configs/M5253DEMO.h b/include/configs/M5253DEMO.h
index 1fea6c3..50b3a03 100644
--- a/include/configs/M5253DEMO.h
+++ b/include/configs/M5253DEMO.h
@@ -88,6 +88,7 @@
 #	define _IO_BASE			0
 #endif
 
+#define CONFIG_NET_MULTI		1
 #define CONFIG_DRIVER_DM9000
 #ifdef CONFIG_DRIVER_DM9000
 #	define CONFIG_DM9000_BASE	(CONFIG_SYS_CS1_BASE | 0x300)