Missing var

Signed-off-by: Caio Oliveira <caiooliveirafarias0@gmail.com>

src/video_core/vulkan_common/vulkan_device.cpp

@@ -1256,6 +1256,8 @@ bool Device::GetSuitability(bool requires_swapchain) {
 
     const bool is_intel_windows = driver_id == VK_DRIVER_ID_INTEL_PROPRIETARY_WINDOWS;
     const bool is_turnip = driver_id == VK_DRIVER_ID_MESA_TURNIP;
+    const bool is_qualcomm = driver_id == VK_DRIVER_ID_QUALCOMM_PROPRIETARY;
+
     // VK_EXT_CUSTOM_BORDER_COLOR
     if (extensions.custom_border_color && (driver_id == VK_DRIVER_ID_QUALCOMM_PROPRIETARY || is_turnip)) {
         const char* driver_name = is_turnip ? "Turnip" : "Adreno";