drivers: clock_control: support numaker 64-bit clock module index (draft 2)

[ccli8]

This is a draft of supporting 64-bit clock module index on NuMaker SoC series.
Relevant points include:

1. No m55m1x yet, take m2l31x as an example
2. In binding file nuvoton,numaker-pcc.yaml, add clock cell clock-module-index-hi32
3. In clock header file for DT, 64-bit value of FOO_MODULE macro expands to two 32-bit cells in BE order
   NOTE: See dt-bindings/clock/numaker_m2l31x_clock.h
   NOTE: Check the link for requirement of 64-bit integer in zephyr
   https://docs.zephyrproject.org/latest/build/dts/intro-syntax-structure.html
4. Clock ontrol driver is soc-conditional on clock module index
5. Other drivers (gpio, serial, etc.) also must be soc-conditional on clock module index

Changes to existent soc port (taking m46x as an example):

1. In m46x.dtsi, change #clock-cells to 4 from 3
2. Re-generate numaker_m46x_clock.h which has FOO_MODULE macro expanding to two cells, with MSB cell being 0x0
3. No need to change other drivers for not supporting 64-bit module index