Integrate new result macros. (#1780)

* result: try out some experimental shenanigans

* result: sketch out some more shenanigans

* result: see what it looks like to convert kernel to use result conds instead of guards

* make rest of kernel use experimental new macro-ing

libraries/libmesosphere/source/kern_k_client_session.cpp

@@ -40,7 +40,7 @@ namespace ams::kern {
         request->Initialize(nullptr, address, size);
 
         /* Send the request. */
-        return m_parent->OnRequest(request);
+        R_RETURN(m_parent->OnRequest(request));
     }
 
     Result KClientSession::SendAsyncRequest(KEvent *event, uintptr_t address, size_t size) {
@@ -55,7 +55,7 @@ namespace ams::kern {
         request->Initialize(event, address, size);
 
         /* Send the request. */
-        return m_parent->OnRequest(request);
+        R_RETURN(m_parent->OnRequest(request));
     }
 
 }