qcacld-3.0: Start NDI in AUTO mode to allow max supported mode

Currently, NDI is started in 11AC mode through the API
hdd_ndi_start_bss(). Max supported mode(e.g. 11AX) is picked by
csr_roam_get_phy_mode_band_for_bss() if either of the "ini param
gDot11Mode" or "input profile mode" is set to AUTO.
But if the ini param gDot11Mode is configured as 12(11AX)
explicitly, csr_roam_get_phy_mode_band_for_bss() picks the mode
sent by hdd_ndi_start_bss() which is 11AC(or the min out of
these two).
So, start the NDI in AUTO mode to let the mode be decided based
on the ini param gDot11Mode and firmware support.

Change-Id: I404ea7a4e042262032c17e5c736501146910d084
CRs-Fixed: 2931071

core/hdd/src/wlan_hdd_nan_datapath.c

@@ -253,7 +253,7 @@ static int hdd_ndi_start_bss(struct hdd_adapter *adapter,
 	roam_profile->SSIDs.numOfSSIDs = 1;
 	roam_profile->SSIDs.SSIDList->SSID.length = 0;
 
-	roam_profile->phyMode = eCSR_DOT11_MODE_11ac;
+	roam_profile->phyMode = eCSR_DOT11_MODE_AUTO;
 	roam_profile->BSSType = eCSR_BSS_TYPE_NDI;
 	roam_profile->BSSIDs.numOfBSSIDs = 1;
 	qdf_mem_copy((void *)(roam_profile->BSSIDs.bssid),