[amdgpu][openmp][nfc] Restore stb_local on DeviceInfo symbol

GitOrigin-RevId: c214cb6a689581c1b7f3b702b5da6d68de6eaf3f
diff --git a/libomptarget/plugins/amdgpu/src/rtl.cpp b/libomptarget/plugins/amdgpu/src/rtl.cpp
index 7552986..3da571f 100644
--- a/libomptarget/plugins/amdgpu/src/rtl.cpp
+++ b/libomptarget/plugins/amdgpu/src/rtl.cpp
@@ -1116,7 +1116,7 @@
 // Putting accesses to DeviceInfo global behind a function call prior
 // to changing to use init_plugin/deinit_plugin calls
 static RTLDeviceInfoTy DeviceInfoState;
-RTLDeviceInfoTy& DeviceInfo() { return DeviceInfoState; }
+static RTLDeviceInfoTy& DeviceInfo() { return DeviceInfoState; }
 
 namespace {