board: igep003x: convert to DM_I2C

Conversion to DM_I2C is mandatory, enable DM_I2C
to disable board removal warning.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/configs/am335x_igep003x_defconfig b/configs/am335x_igep003x_defconfig
index ef4d866..1994388 100644
--- a/configs/am335x_igep003x_defconfig
+++ b/configs/am335x_igep003x_defconfig
@@ -74,7 +74,7 @@
 CONFIG_VERSION_VARIABLE=y
 CONFIG_NET_RETRY_COUNT=10
 CONFIG_BOOTP_SEND_HOSTNAME=y
-CONFIG_SYS_I2C_LEGACY=y
+CONFIG_DM_I2C=y
 CONFIG_SPL_SYS_I2C_LEGACY=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_MTD=y