[PATCH] PPC4xx: Add support for multiple I2C busses

This patch adds support for multiple I2C busses on the PPC4xx
platforms. Define CONFIG_I2C_MULTI_BUS in the board config file
to make use of this feature.

It also merges the 405 and 440 i2c header files into one common
file 4xx_i2c.h.

Also the 4xx i2c reset procedure is reworked since I experienced
some problems with the first access on the 440SPe Katmai board.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/esd/du405/du405.c b/board/esd/du405/du405.c
index a019ce4..6943213 100644
--- a/board/esd/du405/du405.c
+++ b/board/esd/du405/du405.c
@@ -25,7 +25,7 @@
 #include "du405.h"
 #include <asm/processor.h>
 #include <ppc4xx.h>
-#include <405gp_i2c.h>
+#include <4xx_i2c.h>
 #include <command.h>
 
 DECLARE_GLOBAL_DATA_PTR;