video: imx-hdmi: search for DDC node only when EDID support is enabled
This uses i2c functions that may not be available in every configuration
and is only needed if EDID support is enabled, which in turn already
selects I2C.
Fixes:
drivers/video/imx-ipu-v3/imx-hdmi.c:
undefined reference to `of_find_i2c_adapter_by_node'
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>