i2c, omap24xx: convert driver to new mutlibus/mutliadapter framework

- add omap24xx driver to new multibus/multiadpater support
- adapted all config files, which uses this driver

Tested on the am335x based siemens boards rut, dxr2 and pxm2
posted here:
http://patchwork.ozlabs.org/patch/263211/

Signed-off-by: Heiko Schocher <hs@denx.de>
Tested-by: Tom Rini <trini@ti.com>
Cc: Lars Poeschel <poeschel@lemonage.de>
Cc: Steve Sakoman <sakoman@gmail.com>
Cc: Thomas Weber <weber@corscience.de>
Cc: Tom Rix <Tom.Rix@windriver.com>
Cc: Grazvydas Ignotas <notasas@gmail.com>
Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Cc: Luca Ceresoli <luca.ceresoli@comelit.it>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Ilya Yanok <yanok@emcraft.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Nishanth Menon <nm@ti.com>
Cc: Pali Rohár <pali.rohar@gmail.com>
Cc: Peter Barada <peter.barada@logicpd.com>
Cc: Nagendra T S  <nagendra@mistralsolutions.com>
Cc: Michael Jones <michael.jones@matrix-vision.de>
Cc: Raphael Assenat <raph@8d.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index 57fedab..8edd21b 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -397,7 +397,7 @@
 	struct am335x_baseboard_id header;
 
 	enable_i2c0_pin_mux();
-	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
 	if (read_eeprom(&header) < 0)
 		puts("Could not get board ID.\n");
 
diff --git a/board/ti/am3517crane/am3517crane.c b/board/ti/am3517crane/am3517crane.c
index 5eb97ff..a649697 100644
--- a/board/ti/am3517crane/am3517crane.c
+++ b/board/ti/am3517crane/am3517crane.c
@@ -43,8 +43,8 @@
  */
 int misc_init_r(void)
 {
-#ifdef CONFIG_DRIVER_OMAP34XX_I2C
-	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#ifdef CONFIG_SYS_I2C_OMAP34XX
+	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
 #endif
 
 	dieid_num_r();
diff --git a/board/ti/evm/evm.c b/board/ti/evm/evm.c
index c71c218..81dd081 100644
--- a/board/ti/evm/evm.c
+++ b/board/ti/evm/evm.c
@@ -146,8 +146,8 @@
 int misc_init_r(void)
 {
 
-#ifdef CONFIG_DRIVER_OMAP34XX_I2C
-	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#ifdef CONFIG_SYS_I2C_OMAP34XX
+	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
 #endif
 
 #if defined(CONFIG_CMD_NET)