* DMA buffers regions are automatically rounded up to the next power of 2 via
the linker script. This ensures that these buffers, when rounded up, can actually
fit into their respective memories. It also ensures that when/if the MPU is used
to configure these regions, it will not round up the regions sizes, which may cause
the MPU to configure a region bigger than the DMA buffer.
* GC blocks can be rearranged in any order, including the main heap/first block.
This is very important for boards with limited RAM to avoid fragmenting the contiguous
large heap early before it's actually needed.
* Moved VOSPI memory to its own section. The offset is no longer required, and the
linker script can detect overlaps.
* Renamed GC heap memory to allow more than one heap to exist, and added support for
it in the common linker script. This change allows adding a second heap for malloc/libc
easily if needed.
* For STM32 boards, the domain-specific DMA buffers can now be located anywhere within
their memory regions, as their MPU regions' base addresses and sizes are all set via
linker script variables. Previously, this was defined in headers, and sections could
have easily overlapped without warning.
- Rename options more consistently.
- Add OMV prefix to every config option.
- Replace the ST-specific DCMI prefix with CSI.
- Remove the clock source defined in every header to a common enum.
- Remove obsolete board config options.
* Rename cambus to omv_i2c for consistency with other HALs.
* Rename sensor I2C handle from bus to i2c_bus to allow adding
another handle (ex spi_bus).