arm:goni:pmic: Adjust GONI target platform board to new PMIC framework

Move pmic_init() function call from board_init() to power_init_board()
to work with new PMIC/POWER framework.

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/goni/goni.c

@@ -41,9 +41,16 @@ int board_init(void)
 	gd->bd->bi_arch_number = MACH_TYPE_GONI;
 	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
 
-#if defined(CONFIG_POWER)
-	pmic_init(I2C_5);
-#endif
+	return 0;
+}
+
+int power_init_board(void)
+{
+	int ret;
+
+	ret = pmic_init(I2C_5);
+	if (ret)
+		return ret;
 
 	return 0;
 }