[nce] use correct process memory in fault handlers (#3391)

Lets you correctly play games in qlaunch on NCE

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3391
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: Maufeat <sahyno1996@gmail.com>
Co-committed-by: Maufeat <sahyno1996@gmail.com>

src/core/arm/nce/arm_nce.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 2023 yuzu Emulator Project
@@ -144,7 +144,7 @@ bool ArmNce::HandleFailedGuestFault(GuestContext* guest_ctx, void* raw_info, voi
 bool ArmNce::HandleGuestAlignmentFault(GuestContext* guest_ctx, void* raw_info, void* raw_context) {
     auto& host_ctx = static_cast<ucontext_t*>(raw_context)->uc_mcontext;
     auto* fpctx = GetFloatingPointState(host_ctx);
-    auto& memory = guest_ctx->system->ApplicationMemory();
+    auto& memory = guest_ctx->parent->m_running_thread->GetOwnerProcess()->GetMemory();
 
     // Match and execute an instruction.
     auto next_pc = MatchAndExecuteOneInstruction(memory, &host_ctx, fpctx);
@@ -164,7 +164,8 @@ bool ArmNce::HandleGuestAccessFault(GuestContext* guest_ctx, void* raw_info, voi
     // TODO: handle accesses which split a page?
     const Common::ProcessAddress addr =
         (reinterpret_cast<u64>(info->si_addr) & ~Memory::YUZU_PAGEMASK);
-    if (guest_ctx->system->ApplicationMemory().InvalidateNCE(addr, Memory::YUZU_PAGESIZE)) {
+    auto& memory = guest_ctx->parent->m_running_thread->GetOwnerProcess()->GetMemory();
+    if (memory.InvalidateNCE(addr, Memory::YUZU_PAGESIZE)) {
         // We handled the access successfully and are returning to guest code.
         return true;
     }