Add mii_init() prototype

to get rid of a *lot* of compiler warnings.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/common.h b/include/common.h
index d6286bc..9a5a0ab 100644
--- a/include/common.h
+++ b/include/common.h
@@ -565,7 +565,7 @@
 #define BOOTCOUNT_MAGIC		0xB001C041
 
 /* $(CPU)/.../<eth> */
-/*void mii_init (void);*/
+void mii_init (void);
 
 /* $(CPU)/.../lcd.c */
 ulong	lcd_setmem (ulong);