arm64: dts: qcom: sm8250: Add TLMM pinctrl node

Add the TLMM pinctrl node for SM8250 and reserve pins 28-31 and 40-43 on
the MTP as firmware does not allow Linux to touch these pins.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20200430181716.3797842-1-bjorn.andersson@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>