mgmt/osdp: Fix early check of no-data that holds PD online

When waiting for data from CP, the data timeout check must happen before
no-data check. If not, a partial packet may endlessly hold PD in
"wait-for-data" state, while the PD keeps reporting status as online
till another packet is received.

Fix this my moving no-data check below the timeout check.

Signed-off-by: Siddharth Chandrasekaran <siddharth@embedjournal.com>