[chef] linux wpa fix (#25438)

* fix: Wi-Fi init on linux target for chef

* chg: removed uncessary namespace scoping, restyle

examples/chef/linux/main.cpp

@@ -20,16 +20,31 @@
 
 #include <app-common/zap-generated/ids/Attributes.h>
 #include <app/ConcreteAttributePath.h>
+#include <app/clusters/network-commissioning/network-commissioning.h>
 #include <lib/support/logging/CHIPLogging.h>
+#include <platform/Linux/NetworkCommissioningDriver.h>
 
 #include <lib/shell/Engine.h>
 
 #include <ChipShellCollection.h>
 
 using namespace chip;
 using namespace chip::Shell;
+using namespace chip::app;
 
-void ApplicationInit() {}
+#if CHIP_DEVICE_CONFIG_ENABLE_WPA
+namespace {
+DeviceLayer::NetworkCommissioning::LinuxWiFiDriver sLinuxWiFiDriver;
+Clusters::NetworkCommissioning::Instance sWiFiNetworkCommissioningInstance(0, &sLinuxWiFiDriver);
+} // namespace
+#endif
+
+void ApplicationInit()
+{
+#if CHIP_DEVICE_CONFIG_ENABLE_WPA
+    sWiFiNetworkCommissioningInstance.Init();
+#endif
+}
 
 int main(int argc, char * argv[])
 {