clk: tegra124: Add support for Tegra124 clocks

Implement clock support for Tegra124.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>

diff --cc Documentation/devicetree/bindings/clock/nvidia,tegra124-car.txt
Simple merge

diff --cc drivers/clk/tegra/Makefile
Simple merge

diff --cc drivers/clk/tegra/clk-tegra124.c
Simple merge

diff --cc include/dt-bindings/clock/tegra124-car.h
Simple merge