Currently host check 3rd bit of the extended feature flag to
know whether FW supports below two features:
1. Roam Frame info stats - per candidate frames support
2. multi-client feature flags support
The host should check different bits for different features.
Fix is to allow the host to check the first unused bit
(here 4th bit) of extended feature, flag to check whether FW
supports multi-client feature flags support.
Change-Id: I485aeab6a90e900a52e88cd013645203457c1adb
CRs-Fixed: 3184410
be6648764a