Firmware sends the roam scan info tlv to driver during roaming.
Currently, in this tlv, firmware fills scan type as (0-3) and
driver log this as "PARTIAL", "FULL", "NO SCAN" and "Higher Band"
But with new requirement, idle roaming shall only roam to higher band
(2.4 GHz < 5 GHz < 6 GHz) than current band.
1. If current band is 2.4 GHz, it cannot roam to 2.4 GHz.
It can roam to 5 GHz and 6 GHz.
2. If current band is 5 GHz, it cannot roam to 2.4 GHz and 5 GHz.
It can roam to 6 GHz.
So, to add this requirement, firmware introduces new scan type 4 for
which driver need to log.
Change-Id: I80d1c47a434da5009aed4cab08c6eae91bda5b0e
CRs-Fixed: 3379468
4d22da60ff