ARM: dts: qcom: apq8064-ifc6410: drop HDMI HPD GPIO

There is no need to specify separate HPD gpio for the HDMI block. Use
built-in HPD in order to detect if the monitor is plugged or not.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250209-fd-hdmi-hpd-v4-16-6224568ed87f@linaro.org


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