Updated documentation regarding Corundum addition to ADRV9009ZU11EG

- Updated the projects/adrv9009zu11eg/adrv2crr_fmc/README.md
- Updated ADRV9009ZU11EG documentation

Signed-off-by: Cristian Mihai Popa <cristianmihai.popa@analog.com>

Author: cristianmihaipopa