GPU (Linux): fix building without features

Author: CarterLi

src/detection/gpu/gpu_linux.c

@@ -105,19 +105,24 @@ FF_MAYBE_UNUSED static const char* drmFindRenderFromCard(const char* drmCardKey,
 
 static const char* drmDetectAmdSpecific(const FFGPUOptions* options, FFGPUResult* gpu, const char* drmKey, FFstrbuf* buffer)
 {
+    #if FF_HAVE_DRM
     const char* error = drmFindRenderFromCard(drmKey, buffer);
     if (error) return error;
     if (ffStrbufEqualS(&gpu->driver, "radeon"))
         return ffDrmDetectRadeon(options, gpu, buffer->chars);
     else
     {
-#if FF_HAVE_DRM_AMDGPU
+        #if FF_HAVE_DRM_AMDGPU
         return ffDrmDetectAmdgpu(options, gpu, buffer->chars);
-#else
+        #else
         FF_UNUSED(options, gpu, drmKey, buffer);
         return "Fastfetch is not compiled with libdrm_amdgpu support";
-#endif
+        #endif
     }
+    #else
+    FF_UNUSED(gpu, drmKey, buffer);
+    return "Fastfetch is not compiled with drm support";
+    #endif
 }
 
 static void pciDetectAmdSpecific(const FFGPUOptions* options, FFGPUResult* gpu, FFstrbuf* pciDir, FFstrbuf* buffer)