ARM: qcom_defconfig: add anx78xx HDMI bridge support

Add the Analogix anx78xx driver so that the external display over HDMI
can be used on Nexus 5 phones.

Reviewed-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Brian Masney <masneyb@onstation.org>
Link: https://lore.kernel.org/r/20191024103140.10077-3-masneyb@onstation.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>