[fpv/flash_ctrl] Fix flash_ctrl_sec_cm name
[fpv/flash_ctrl] Fix flash_ctrl_sec_cm name

This PR fixes flash_ctrl sec_cm name

Signed-off-by: Cindy Chen <399ad771a111eac8923348b1e2af093034e5d4f1@opentitan.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan