i2c, ppc4xx_i2c: switch to new multibus/multiadapter support

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Cc: Heiko Schocher <hs@denx.de>
Cc: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/io.h b/include/configs/io.h
index 03661cc..4950ad7 100644
--- a/include/configs/io.h
+++ b/include/configs/io.h
@@ -114,7 +114,7 @@
 /*
  * I2C stuff
  */
-#define CONFIG_SYS_I2C_SPEED		100000
+#define CONFIG_SYS_I2C_PPC4XX_SPEED_0		100000
 
 /* Temp sensor/hwmon/dtt */
 #define CONFIG_DTT_LM63		1	/* National LM63	*/