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/include/mesosphere/kern_k_unsafe_memory.hpp

@@ -72,7 +72,7 @@ namespace ams::kern {
 
                 R_UNLESS(size >= m_current_size, svc::ResultLimitReached());
                 m_limit_size = size;
-                return ResultSuccess();
+                R_SUCCEED();
             }
     };
 }