Currently when gDot11Mode=6 (11n only) is configured in ini and AP
is operating in 11n mode the STA is connecting in HT mode, but when
AP is operating in 11AC/11AX mode then STA is connecting in legacy
mode i.e 11b/g/a. This is due to check which compares phymode of
BSS is 11n or not but failed to check BSS phymode is 11ac/ax.
Due to this there is mismatch in phymode and mode is downgraded
to legacy.
These changes will perform the check and allow STA to connect in
11n.
Change-Id: I8196b44db5a12fbba39ffcf58202fa1863b1c4b4
CRs-Fixed: 2965287
1522916450