samples: wifi: enable reel_board to test winc1500

We don't have anything that build tests the win1500 driver, so
enable reel_board to provide coverage on the driver.

Signed-off-by: Kumar Gala <galak@kernel.org>
diff --git a/samples/net/wifi/sample.yaml b/samples/net/wifi/sample.yaml
index b252740..9c3c46a 100644
--- a/samples/net/wifi/sample.yaml
+++ b/samples/net/wifi/sample.yaml
@@ -6,7 +6,7 @@
   name: WiFi sample app
 tests:
   sample.net.wifi:
-    platform_allow: cc3220sf_launchxl disco_l475_iot1
+    platform_allow: cc3220sf_launchxl disco_l475_iot1 reel_board
   sample.net.wifi.mikroe_wifi_bt_click:
     extra_args: SHIELD=mikroe_wifi_bt_click_mikrobus
     platform_allow: lpcxpresso55s69_cpu0