Both CC93 and CCMP2 store the environment at the end of BOOT1 partition
and the redundant environment at the end of BOOT2 partition. Reuse the
'fw_env.config' file defined for CC93 for both platforms, and also include
CC91 in the process.
https://onedigi.atlassian.net/browse/DEL-9119
Signed-off-by: Gonzalo Ruiz <Gonzalo.Ruiz@digi.com>