fix ncp builds

Author: mkardous-silabs

examples/air-quality-sensor-app/silabs/BUILD.gn

@@ -91,6 +91,18 @@ if (wifi_soc) {
       "${examples_common_plat_dir}",
     ]
 
+    if (use_wf200) {
+      # TODO efr32_sdk should not need a header from this location
+      include_dirs += [ "${examples_plat_dir}/wf200" ]
+    }
+
+    if (chip_enable_ble_rs911x) {
+      # TODO efr32_sdk should not need a header from this location
+      include_dirs += [
+        "${examples_plat_dir}/rs911x",
+        "${examples_plat_dir}/rs911x/hal",
+      ]
+    }
     defines = []
     if (chip_enable_pw_rpc) {
       defines += [