service: Use nested namespace specifiers where applicable

There were a few places where nested namespace specifiers weren't being
used where they could be within the service code. This amends that to
make the namespacing a tiny bit more compact.

src/core/hle/service/gsp/gsp.cpp

@@ -7,8 +7,7 @@
 #include "core/hle/kernel/shared_memory.h"
 #include "core/hle/service/gsp/gsp.h"
 
-namespace Service {
-namespace GSP {
+namespace Service::GSP {
 
 static std::weak_ptr<GSP_GPU> gsp_gpu;
 
@@ -32,5 +31,4 @@ void InstallInterfaces(SM::ServiceManager& service_manager) {
     std::make_shared<GSP_LCD>()->InstallAsService(service_manager);
 }
 
-} // namespace GSP
-} // namespace Service
+} // namespace Service::GSP

src/core/hle/service/gsp/gsp.h

@@ -11,8 +11,7 @@
 #include "core/hle/service/gsp/gsp_gpu.h"
 #include "core/hle/service/gsp/gsp_lcd.h"
 
-namespace Service {
-namespace GSP {
+namespace Service::GSP {
 /**
  * Retrieves the framebuffer info stored in the GSP shared memory for the
  * specified screen index and thread id.
@@ -29,5 +28,4 @@ FrameBufferUpdate* GetFrameBufferInfo(u32 thread_id, u32 screen_index);
 void SignalInterrupt(InterruptId interrupt_id);
 
 void InstallInterfaces(SM::ServiceManager& service_manager);
-} // namespace GSP
-} // namespace Service
+} // namespace Service::GSP

src/core/hle/service/gsp/gsp_gpu.cpp

@@ -23,8 +23,7 @@
 // Main graphics debugger object - TODO: Here is probably not the best place for this
 GraphicsDebugger g_debugger;
 
-namespace Service {
-namespace GSP {
+namespace Service::GSP {
 
 // Beginning address of HW regs
 const u32 REGS_BEGIN = 0x1EB00000;
@@ -807,5 +806,4 @@ SessionData::~SessionData() {
     used_thread_ids[thread_id] = false;
 }
 
-} // namespace GSP
-} // namespace Service
+} // namespace Service::GSP

src/core/hle/service/gsp/gsp_gpu.h

@@ -17,8 +17,7 @@ namespace Kernel {
 class SharedMemory;
 } // namespace Kernel
 
-namespace Service {
-namespace GSP {
+namespace Service::GSP {
 
 /// GSP interrupt ID
 enum class InterruptId : u8 {
@@ -411,5 +410,4 @@ private:
 
 ResultCode SetBufferSwap(u32 screen_id, const FrameBufferInfo& info);
 
-} // namespace GSP
-} // namespace Service
+} // namespace Service::GSP

src/core/hle/service/gsp/gsp_lcd.cpp

@@ -5,8 +5,7 @@
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/service/gsp/gsp_lcd.h"
 
-namespace Service {
-namespace GSP {
+namespace Service::GSP {
 
 GSP_LCD::GSP_LCD() : ServiceFramework("gsp::Lcd") {
     static const FunctionInfo functions[] = {
@@ -23,5 +22,4 @@ GSP_LCD::GSP_LCD() : ServiceFramework("gsp::Lcd") {
     RegisterHandlers(functions);
 };
 
-} // namespace GSP
-} // namespace Service
+} // namespace Service::GSP

src/core/hle/service/gsp/gsp_lcd.h

@@ -6,8 +6,7 @@
 
 #include "core/hle/service/service.h"
 
-namespace Service {
-namespace GSP {
+namespace Service::GSP {
 
 class GSP_LCD final : public ServiceFramework<GSP_LCD> {
 public:
@@ -15,5 +14,4 @@ public:
     ~GSP_LCD() = default;
 };
 
-} // namespace GSP
-} // namespace Service
+} // namespace Service::GSP