firmware: hook: Restrict visibility of `run_hooks_from_dir`
firmware: hook: Restrict visibility of `run_hooks_from_dir`

This function should only be visible internally to the crate.

Signed-off-by: Otavio Salvador <1d31b11c1b92bf5d043d36edfe7174db39a6b891@ossystems.com.br>

UpdateHub/updatehub