arm64: dts: qcom: sm8250: remove wakeup-parent for TLMM node

On SM8250 TLMM doesn't use PDC interrupt controller for wakeup events.
Instead it handles them on their own (not implemented yet). In addition
setting wakeup-parent property to &pdc will result in parent hwirq being
set to ~0UL, which interact badly with the irqdomains trimming code. So
remove the wakeup-parent property.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 16951b49 ("arm64: dts: qcom: sm8250: Add TLMM pinctrl node")