[MIPS] Rename Alchemy processor configs into CONFIG_SOC_*

CONFIG_SOC_AU1X00

  Common Alchemy Au1x00 stuff. All Alchemy processor based machines
  need to have this config as a system type specifier.

CONFIG_SOC_AU1000, CONFIG_SOC_AU1100, CONFIG_SOC_AU1200,
CONFIG_SOC_AU1500, CONFIG_SOC_AU1550

  Machine type specifiers. Each port should have one of aboves.

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
diff --git a/include/configs/gth2.h b/include/configs/gth2.h
index 23618db..c2d6ca7 100644
--- a/include/configs/gth2.h
+++ b/include/configs/gth2.h
@@ -30,9 +30,9 @@
 
 #define CONFIG_MIPS32		1  /* MIPS32 CPU core	*/
 #define CONFIG_GTH2		1
-#define CONFIG_AU1X00		1  /* alchemy series cpu */
+#define CONFIG_SOC_AU1X00	1  /* alchemy series cpu */
 
-#define CONFIG_AU1000		1
+#define CONFIG_SOC_AU1000	1
 
 #define CONFIG_MISC_INIT_R	1