i2c, soft-i2c: switch to new multibus/multiadapter support

- added to soft_i2c driver new multibus/multiadpater support
- adapted all config files, which uses this driver

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
diff --git a/include/configs/utx8245.h b/include/configs/utx8245.h
index 60d1503..4815664 100644
--- a/include/configs/utx8245.h
+++ b/include/configs/utx8245.h
@@ -235,8 +235,7 @@
  *------------------------------------------------------------------*/
 #if 1
 #define CONFIG_HARD_I2C		1		/* To enable I2C support	*/
-#undef  CONFIG_SOFT_I2C				/* I2C bit-banged		*/
-#define CONFIG_SYS_I2C_SPEED		400000		/* I2C speed and slave address	*/
+#define CONFIG_SYS_I2C_SPEED		400000
 #define CONFIG_SYS_I2C_SLAVE		0x7F
 #endif