arm64: dts: qcom: msm8992: Modernize the DTS style

arm64: dts: qcom: msm8992: Modernize the DTS style

Following changes have been made:

- remove name, compatible and msm-id
- wrap clocks in clocks{}
- order nodes by name and by address
- clock_gcc -> gcc
- msmgpio -> tlmm
- retire msm8992-pins.dtsi
- add some of the missing pins
- make comments C-style
- make apcs a mailbox

Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Link: https://lore.kernel.org/r/20200625182118.131476-2-konradybcio@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>