samples: wifi: qt: Fix socket errors

Increase the max FD's to accomodate QT module.

Signed-off-by: Triveni Danda <triveni.danda@nordicsemi.no>

samples/wifi/wfa_qt_app/prj.conf

@@ -6,6 +6,10 @@
 CONFIG_WIFI=y
 CONFIG_WIFI_NRF700X=y
 CONFIG_WFA_QT_CONTROL_APP=y
+# Ideally this has to be done in the QT module, but we already override this in the
+# hostap module (7), so, hostap will override QT module's settings, so, we have to
+# override hostap's settings here.
+CONFIG_POSIX_MAX_FDS=10
 
 # WPA supplicant
 CONFIG_WPA_SUPP=y