[video_core] Fix initial DMA sync deadlock in OpenGL by initializing synced state (#3987)

This fixes a deadlock issue that prevents any game using OpenGL + GPU Accurate from booting when Sync Memory Operations is enabled.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3987
Reviewed-by: Lizzie <lizzie@eden-emu.dev>

src/video_core/dma_pusher.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -26,7 +26,7 @@ constexpr u32 MacroRegistersStart = 0xE00;
 DmaPusher::DmaPusher(Core::System& system_, GPU& gpu_, MemoryManager& memory_manager_,
                      Control::ChannelState& channel_state_)
     : gpu{gpu_}, system{system_}, memory_manager{memory_manager_}, puller{gpu_, memory_manager_,
-                                                                          *this, channel_state_}, signal_sync{false}, synced{false} {}
+                                                                          *this, channel_state_}, signal_sync{false}, synced{true} {}
 
 DmaPusher::~DmaPusher() = default;