[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/sandburst/common/ppc440gx_i2c.c b/board/sandburst/common/ppc440gx_i2c.c
index 859dd7a..1e3dffb 100644
--- a/board/sandburst/common/ppc440gx_i2c.c
+++ b/board/sandburst/common/ppc440gx_i2c.c
@@ -27,13 +27,8 @@
  */
 #include <common.h>
 #include <ppc4xx.h>
-#if defined(CONFIG_440)
-#   include <440_i2c.h>
-#else
-#   include <405gp_i2c.h>
-#endif
+#include <4xx_i2c.h>
 #include <i2c.h>
-#include <440_i2c.h>
 #include <command.h>
 #include "ppc440gx_i2c.h"
 
diff --git a/board/sandburst/common/ppc440gx_i2c.h b/board/sandburst/common/ppc440gx_i2c.h
index cd4fc86..10000f5 100644
--- a/board/sandburst/common/ppc440gx_i2c.h
+++ b/board/sandburst/common/ppc440gx_i2c.h
@@ -27,11 +27,7 @@
  */
 #include <common.h>
 #include <ppc4xx.h>
-#if defined(CONFIG_440)
-#   include <440_i2c.h>
-#else
-#   include <405gp_i2c.h>
-#endif
+#include <4xx_i2c.h>
 #include <i2c.h>
 
 #ifdef CONFIG_HARD_I2C