xilinx: versal-net: Add env redund offset

ENV_OFFSET_REDUND config is by default set to 0 for flashes.
Saving the env variables is overwriting data at 0 offset,
which is wrong. So add default redund env offset
ENV_OFFSET_REDUND at 0x7F00000 for Versal NET platform.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20240614125110.23058-1-venkatesh.abbarapu@amd.com


Signed-off-by: Michal Simek <michal.simek@amd.com>