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/board/bluewater/snapper9260/snapper9260.c b/board/bluewater/snapper9260/snapper9260.c
index 60c55e9..b4378db 100644
--- a/board/bluewater/snapper9260/snapper9260.c
+++ b/board/bluewater/snapper9260/snapper9260.c
@@ -145,7 +145,7 @@
 
 	/* Initialise peripherals */
 	at91_seriald_hw_init();
-	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+	i2c_set_bus_num(0);
 	nand_hw_init();
 	macb_hw_init();