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/freescale/m547xevb/README b/board/freescale/m547xevb/README
index d3aec20..1a8cbce 100644
--- a/board/freescale/m547xevb/README
+++ b/board/freescale/m547xevb/README
@@ -99,7 +99,7 @@
 
 CONFIG_FSL_I2C		-- define to use FSL common I2C driver
 CONFIG_HARD_I2C		-- define for I2C hardware support
-CONFIG_SOFT_I2C		-- define for I2C bit-banged
+CONFIG_SYS_I2C_SOFT	-- define for I2C bit-banged
 CONFIG_SYS_I2C_SPEED		-- define for I2C speed
 CONFIG_SYS_I2C_SLAVE		-- define for I2C slave address
 CONFIG_SYS_I2C_OFFSET		-- define for I2C base address offset