KM: define CONFIG_SYS_I2C_INIT_BOARD only for concerned board

This must be defined for all the keymile boards that use the common
i2c_abort function that is used to "reset" the I2C bus. These are
currently km82xx and km_arm boards.

The  km83xx boards use other functions and thus do not need this.

This patch removes the CONFIG_SYS_I2C_INIT_BOARD from keymile-common.h
and defines it for km_arm.h and km82xx.h.

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
diff --git a/include/configs/km/km_arm.h b/include/configs/km/km_arm.h
index 75b6250..36c2fba 100644
--- a/include/configs/km/km_arm.h
+++ b/include/configs/km/km_arm.h
@@ -176,10 +176,9 @@
 #undef CONFIG_I2C_MVTWSI
 #define CONFIG_SYS_I2C
 #define	CONFIG_SYS_I2C_SOFT	/* I2C bit-banged	*/
+#define CONFIG_SYS_I2C_INIT_BOARD
 
 #define	CONFIG_KIRKWOOD_GPIO		/* Enable GPIO Support */
-#if defined(CONFIG_SYS_I2C_SOFT)
-
 #define CONFIG_SYS_NUM_I2C_BUSES	6
 #define CONFIG_SYS_I2C_MAX_HOPS		1
 #define CONFIG_SYS_I2C_BUSES	{	{0, {I2C_NULL_HOP} }, \
@@ -214,7 +213,6 @@
 
 #define	CONFIG_SYS_I2C_SOFT_SLAVE	0x0
 #define	CONFIG_SYS_I2C_SOFT_SPEED	100000
-#endif
 
 /* EEprom support 24C128, 24C256 valid for environment eeprom */
 #define CONFIG_SYS_I2C_MULTI_EEPROMS