Fix channel_sweep_test_quick test case names

ChannelSweepTest uses capital country codes.

Change-Id: Icdefea1847883484cb6cb3de315b18934f24098a
Reviewed-on: https://fuchsia-review.googlesource.com/c/antlion/+/904969
Reviewed-by: Patrick Lu <patricklu@google.com>
Fuchsia-Auto-Submit: Sam Balana <sbalana@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
diff --git a/tests/wlan/performance/BUILD.gn b/tests/wlan/performance/BUILD.gn
index 7adc144..123fd1c 100644
--- a/tests/wlan/performance/BUILD.gn
+++ b/tests/wlan/performance/BUILD.gn
@@ -16,10 +16,10 @@
   main_source = "ChannelSweepTest.py"
   environments = display_ap_iperf_envs
   test_cases = [
-    "test_us_wpa2_channel_8_20mhz",
-    "test_us_wpa2_channel_40_80mhz", # non-DFS 5GHz channel
-    "test_us_wpa2_channel_100_80mhz", # DFS 5GHz channel
-    "test_us_wpa2_channel_165_20mhz",
+    "test_US_wpa2_channel_8_20mhz",
+    "test_US_wpa2_channel_40_80mhz", # non-DFS 5GHz channel
+    "test_US_wpa2_channel_100_80mhz", # DFS 5GHz channel
+    "test_US_wpa2_channel_165_20mhz",
   ]
 }