arm64: dts: qcom: use generic node name for CS35L41 speaker

Node names should be generic so use consistently speaker-amp for CS35L41
speaker amplifier.

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/20221224154255.43499-5-krzysztof.kozlowski@linaro.org