habanalabs: read device boot errors after cpucp is up

Boot cpu can report errors in various boot stages.
Current implementaion does not take into consideration errors
reported in late stages, hence we will check for errors at the most
late stage when fetching cpucp information.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>