i2c, davinci: add i2c set speed

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Paulraj Sandeep <s-paulraj@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

drivers/i2c/davinci_i2c.c

@@ -119,6 +119,11 @@ void i2c_init(int speed, int slaveadd)
 	udelay(1000);
 }
 
+int i2c_set_bus_speed(unsigned int speed)
+{
+	i2c_init(speed, CONFIG_SYS_I2C_SLAVE);
+	return 0;
+}
 
 int i2c_probe(u_int8_t chip)
 {