wifi: Correct check condition for SAP 11AX mode.

Current hostapd doesn't support mode: HOSTAPD_MODE_IEEE80211AX.
Using he_capabilies->he_supported to identify if the current mode is
AX.

Bug: 162484222
Test: Enable SAP on P21 (supported AX) and check the wifistandard is
AX mode.

Change-Id: Ic2f57be652c9407f0f7b8b150f9ae8b4e640848d
1 file changed