CORE_V_MCU high level design specs

[cst-rameez]

Adding high level design specs for the IPs which have insufficient information in core_v_mcu user manual https://docs.openhwgroup.org/projects/core-v-mcu/

Following are CORE-V-MCU IP blocks whose documents are updated:
APB Advanced Timer
APB SoC Controller
APB PLL Interface
APB_GPIO
APB Timer
ABP I2C Slave
APB Event Control
UDMA CAMERA Interface
UDMA SD Card Interface

[cst-rameez]

@MikeOpenHWGroup, I would like to add you as the reviewer here.

[DBees]

Hi @cst-rameez thank you so much for this work. Actually however the correct place to vector these documentation updates would be on the https://github.com/openhwgroup/core-v-mcu/tree/master/docs repo where the documentation files are written in .rst
Suggest that we setup a quick chat to chart next steps

[PaoloS02]

Any updates on this?

[MikeOpenHWGroup]

! Completely forgot about this one - thanks for the gentle prod @PaoloS02.

These updates have been contributed to the CORE-V-MCU repository and are now integrated into the User Manual. I forgot to close this one. (Will do so now.)