qcacmn: Fix invalid VAP instance error in RCC case

Fix the invalid VAP instance error seen when RCC is
enabled and ol_ath_stats (enhanced stats) feature is
disabled case.
Populate gI as well similar to other rate stats in
CFR handler where this information would not be
available if ol_ath_stats is disabled.

CRs-Fixed: 3056621
Change-Id: Id1af6359408cb977ba0becf298121ee10dd5ef72