wifi: Correct document 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.
BYPASS_INCLUSIVE_LANGUAGE_REASON : The HE is a abbreviation
which is High-Efficiency.

Bug: 162484222
Test: Enable SAP on P21 (supported AX) and check the wifistandard is
AX mode.
BYPASS_INCLUSIVE_LANGUAGE_REASON=The HE is a abbreviation
which is High-Efficiency.
Change-Id: I1f40f2e2e5a0d1a862810d19899a6d968d8c29b2