arm64: dts: qcom: sdm845-db845c: Fix hdmi nodes

As per binding documentation, we should have dsi as node 0 and hdmi
audio as node 1, so fix it

Reported-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: aef9a119 ("arm64: dts: qcom: sdm845-db845c: Add hdmi bridge nodes")
Signed-off-by: Vinod Koul <vkoul@kernel.org>