arm64: dts: qcom: sm8350: Add wakeup-parent to tlmm

Now that TLMM has the wakeup table, specify the Power Domain Controller
to be the wakeup-parent of TLMM.

Reviewed-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210312034218.3324410-2-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>