arm:trats:pmic: Enable fuel-gauge (MAX17042) at Samsung's TRATS board

FG IC built into the MAX8997 device (compliant to MAX17042) is enabled
at TRATS.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>

board/samsung/trats/trats.c

@@ -39,6 +39,7 @@
 #include <power/max8997_pmic.h>
 #include <libtizen.h>
 #include <power/max8997_muic.h>
+#include <power/max17042_fg.h>
 
 #include "setup.h"
 
@@ -242,6 +243,7 @@ int power_init_board(void)
 
 	ret = pmic_init(I2C_5);
 	ret |= pmic_init_max8997();
+	ret |= power_fg_init(I2C_9);
 	ret |= power_muic_init(I2C_5);
 	if (ret)
 		return ret;

include/configs/trats.h

@@ -238,6 +238,8 @@
 #define CONFIG_PMIC_I2C
 #define CONFIG_PMIC_MAX8997
 
+#define CONFIG_POWER_FG
+#define CONFIG_POWER_FG_MAX17042
 #define CONFIG_POWER_MUIC
 #define CONFIG_POWER_MUIC_MAX8997
 #define CONFIG_USB_GADGET