arm64: dts: qcom: qrb2210-rb1: Set up HDMI

Add the required nodes to support display output via the HDMI port.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20231125-topic-rb1_feat-v3-10-4cbb567743bb@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>