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/cpuat91.h b/include/configs/cpuat91.h
index 15d56c3..d9b006a 100644
--- a/include/configs/cpuat91.h
+++ b/include/configs/cpuat91.h
@@ -92,7 +92,6 @@
 #define CONFIG_USART_ID		0/* ignored in arm */
 
 #undef CONFIG_HARD_I2C
-#undef CONFIG_SOFT_I2C
 #define AT91_PIN_SDA			(1<<25)
 #define AT91_PIN_SCL			(1<<26)
 
@@ -139,7 +138,7 @@
 #undef CONFIG_CMD_NFS
 #undef CONFIG_CMD_DHCP
 
-#ifdef CONFIG_SOFT_I2C
+#ifdef CONFIG_SYS_I2C_SOFT
 #define CONFIG_CMD_EEPROM
 #define CONFIG_CMD_I2C
 #endif