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/taishan.h b/include/configs/taishan.h
index c9f1a9f..20989a7 100644
--- a/include/configs/taishan.h
+++ b/include/configs/taishan.h
@@ -133,7 +133,7 @@
 /*-----------------------------------------------------------------------
  * I2C
  *----------------------------------------------------------------------*/
-#define CONFIG_SYS_I2C_SPEED		400000	/* I2C speed and slave address	*/
+#define CONFIG_SYS_I2C_PPC4XX_SPEED_0		400000
 
 #undef CONFIG_SYS_I2C_MULTI_EEPROMS
 #define CONFIG_SYS_I2C_EEPROM_ADDR	0x50