package/wpa_supplicant: fix AP mode settings

package/wpa_supplicant: fix AP mode settings

New wpa_supplicant v2.9 enables by default AP, P2P, WIFI_DISPLAY
features in defconfig. However these features make sense only for
wpa_supplicant drivers supporting AP mode.

That is why, for consistent configuration, these features should
be explicitely disabled in wpa_supplicant .config file unless
they are requested by Config.in options.

Note that at the moment AP support in Buildroot can be enabled
only for NL80211 driver.

Fixes:
http://autobuild.buildroot.net/results/d37672374db935ac29953263ec68a2786ee65cc2/

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Tested-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>