qcacmn: Fix 6 GHz bss HE capable beamformee score

Currently, BSS beamformee score is calculated from vht_cap or
eht caps, so for 6 GHz HE capable BSS it will calculated to zero.
Due to this 5 GHz will always get selected compared to 6 GHz BSS with
all other capabilities and conditions same in both BSS as 5 GHz
will have more total candidate score.
Fix this issue by correct calculation of AP beamformer capability
in case of 6 GHz HE BSS.

Change-Id: I0f3285ce1c5c1aeeba624c5371ff0f884ae78c58
CRs-Fixed: 3351991