configs: trats2: enable CONFIG_DM_I2C_GPIO

Enable the CONFIG_DM_I2C_GPIO for using i2c-gpio.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/configs/trats2_defconfig b/configs/trats2_defconfig
index ab76aa3..6c7b341 100644
--- a/configs/trats2_defconfig
+++ b/configs/trats2_defconfig
@@ -34,6 +34,7 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_ISO_PARTITION=y
 CONFIG_OF_CONTROL=y
+CONFIG_DM_I2C_GPIO=y
 CONFIG_DFU_MMC=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_SDHCI=y