Convert CONFIG_I2C_EDID et al to Kconfig

This converts the following to Kconfig:
   CONFIG_I2C_EDID
   CONFIG_I2C_EEPROM

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/nitrogen6dl2g_defconfig b/configs/nitrogen6dl2g_defconfig
index 3c32edc..593a43e 100644
--- a/configs/nitrogen6dl2g_defconfig
+++ b/configs/nitrogen6dl2g_defconfig
@@ -85,6 +85,7 @@
 CONFIG_USB_ETH_CDC=y
 CONFIG_DM_VIDEO=y
 CONFIG_SYS_WHITE_ON_BLACK=y
+CONFIG_I2C_EDID=y
 CONFIG_VIDEO_IPUV3=y
 CONFIG_SPLASH_SCREEN=y
 CONFIG_SPLASH_SCREEN_ALIGN=y