qcacmn: Add mode based flags to channels in PNO request

Currently 6 GHz channel flags are not set for channels
present in the list from PNO scan request but are set for
all other 6 GHz channels which are added when either of the
two below conditions are satisfied
1. Userspace sets NL80211_SCAN_FLAG_COLOCATED_6GHZ flag
in PNO scan request.
2. At least one 6 GHz channel is present in the PNO scan req.

Add flags for channels in the PNO scan request based on the
scan_mode_6g ini configured similar to active scan request.

Add changes to remove the RNR flag for the channel if the
corresponding short SSID entry is present in the RNR db
Cache since if colocated SSID is different userspace doesn't
include corresponding 2.4/5 GHz channel information in PNO
request.

Change-Id: I22c4f7ecf65d4ab09dfbbe126aefe02f9145de42
CRs-Fixed: 3119113