rsx: Lower some performance warnings to trace to reduce log spam

rpcs3/Emu/RSX/GL/GLTextureCache.cpp

@@ -98,7 +98,7 @@ namespace gl
 		{
 			// This format is completely worthless to CPU processing algorithms where cache lines on die are linear.
 			// If this is happening, usually it means it was not a planned readback (e.g shared pages situation)
-			rsx_log.warning("[Performance warning] CPU readback of swizzled data");
+			rsx_log.trace("[Performance warning] CPU readback of swizzled data");
 
 			// Read-modify-write to avoid corrupting already resident memory outside texture region
 			std::vector<u8> tmp_data(rsx_pitch * height);

rpcs3/Emu/RSX/VK/VKTextureCache.h

@@ -323,7 +323,7 @@ namespace vk
 			{
 				// This format is completely worthless to CPU processing algorithms where cache lines on die are linear.
 				// If this is happening, usually it means it was not a planned readback (e.g shared pages situation)
-				rsx_log.warning("[Performance warning] CPU readback of swizzled data");
+				rsx_log.trace("[Performance warning] CPU readback of swizzled data");
 
 				// Read-modify-write to avoid corrupting already resident memory outside texture region
 				void* data = get_ptr(range.start);