h8300: Fix home page URL in h8300/README

Correct home page URL in h8300/README.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

arch/h8300/README

@@ -11,7 +11,7 @@ H8/300H and H8S
 2.AE 3068/AE 3069
   more information 
   MICROTRONIQUE <http://www.microtronique.com/>
-  Akizuki Denshi Tsusho Ltd. <http://www.akizuki.ne.jp> (Japanese Only)
+  Akizuki Denshi Tsusho Ltd. <http://akizukidenshi.com/> (Japanese Only)
 
 3.H8MAX 
   see http://ip-sol.jp/h8max/ (Japanese Only)