configs: imx: Remove CONFIG_SYS_SPD_BUS_NUM option

According to the README:

"- CONFIG_SYS_SPD_BUS_NUM
		If SPD EEPROM is on an I2C bus other than the first
		one, specify here. Note that the value must resolve
		to something your driver can deal with."

There is no SPD EEPROM on the imx boards, so ged rid of this option.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>

include/configs/imx31_phycore.h

@@ -37,7 +37,6 @@
 
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
-#define CONFIG_SYS_SPD_BUS_NUM		1 /* I2C2 */
 #define CONFIG_SYS_I2C_CLK_OFFSET	I2C2_CLK_OFFSET
 
 #define CONFIG_MXC_UART

include/configs/mx25pdk.h

@@ -115,7 +115,6 @@
 #define CONFIG_CMD_I2C
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
-#define CONFIG_SYS_SPD_BUS_NUM		0 /* I2C1 */
 
 /* RTC */
 #define CONFIG_RTC_IMXDI

include/configs/mx35pdk.h

@@ -42,7 +42,6 @@
  */
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
-#define CONFIG_SYS_SPD_BUS_NUM		0 /* I2C1 */
 #define CONFIG_MXC_SPI
 #define CONFIG_MXC_GPIO
 

include/configs/mx53ard.h

@@ -46,7 +46,6 @@
 #define CONFIG_CMD_I2C
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
-#define CONFIG_SYS_SPD_BUS_NUM		1 /* I2C2 */
 
 /* MMC Configs */
 #define CONFIG_FSL_ESDHC

include/configs/mx53evk.h

@@ -39,7 +39,6 @@
 #define CONFIG_CMD_I2C
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
-#define CONFIG_SYS_SPD_BUS_NUM		1 /* I2C2 */
 
 /* PMIC Configs */
 #define CONFIG_POWER

include/configs/mx53loco.h

@@ -73,7 +73,6 @@
 /* I2C Configs */
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
-#define CONFIG_SYS_SPD_BUS_NUM		0 /* I2C1 */
 
 /* PMIC Controller */
 #define CONFIG_POWER

include/configs/mx53smd.h

@@ -36,7 +36,6 @@
 #define CONFIG_CMD_I2C
 #define CONFIG_SYS_I2C
 #define CONFIG_SYS_I2C_MXC
-#define CONFIG_SYS_SPD_BUS_NUM		1 /* I2C2 */
 
 /* MMC Configs */
 #define CONFIG_FSL_ESDHC