defconfig: am335x_boneblack_vboot: enable i2c driver model

Enable i2c driver model for am335x_boneblack_vboot as omap i2c
supports driver model. Also enable CONFIG_DM_I2C_COMPAT for
legacy drivers of i2c devices.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/am335x_boneblack_vboot_defconfig b/configs/am335x_boneblack_vboot_defconfig
index 903f518..c2f09cb 100644
--- a/configs/am335x_boneblack_vboot_defconfig
+++ b/configs/am335x_boneblack_vboot_defconfig
@@ -49,3 +49,4 @@
 CONFIG_G_DNL_MANUFACTURER="Texas Instruments"
 CONFIG_G_DNL_VENDOR_NUM=0x0451
 CONFIG_G_DNL_PRODUCT_NUM=0xd022
+CONFIG_DM_I2C=y