arm64: dts: qcom: sdm845-db845c: Drop redundant reg = in port

The reg for the port is specified in the dtsi. Remove from the db845c dts.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221117003232.589734-4-bryan.odonoghue@linaro.org