dt-bindings: remoteproc: qcom,adsp: correct msm8996-slpi-pil clocks

According to DTS and Linux driver, the MSM8996 SLPI PIL takes two clocks
- xo and aggre2:

  qcom/msm8996-oneplus3t.dtb: remoteproc@1c00000: clocks: [[20], [3, 64]] is too long
  qcom/msm8996-oneplus3t.dtb: remoteproc@1c00000: clock-names: ['xo', 'aggre2'] is too long

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221124184333.133911-16-krzysztof.kozlowski@linaro.org