arm64: dts: qcom: use generic node name for Bluetooth

Node names should be generic (as Devicetree spec mandates), so use
"bluetooth" for BT node.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230124084951.38195-1-krzysztof.kozlowski@linaro.org