Add CONFIG_MII_INIT support to related boards

Replace CONFIG_8xx and CONFIG_MCF532x to CONFIG_MII_INIT in
cmd_init.c. Add CONFIG_MII_INIT to board configuration files
that use mii_init() in cmd_init.c.

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Acked-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/include/configs/cobra5272.h b/include/configs/cobra5272.h
index 104d94e..c7e3899 100644
--- a/include/configs/cobra5272.h
+++ b/include/configs/cobra5272.h
@@ -158,6 +158,7 @@
 #ifdef CONFIG_MCFFEC
 #	define CONFIG_NET_MULTI		1
 #	define CONFIG_MII		1
+#	define CONFIG_MII_INIT		1
 #	define CFG_DISCOVER_PHY
 #	define CFG_RX_ETH_BUFFER	8
 #	define CFG_FAULT_ECHO_LINK_DOWN