ams: use R_SUCCEED, R_THROW globally

libraries/libstratosphere/source/fssystem/buffers/fssystem_file_system_buddy_heap.cpp

@@ -176,7 +176,7 @@ namespace ams::fssystem {
             } while (m_block_size <= remaining);
         }
 
-        return ResultSuccess();
+        R_SUCCEED();
     }
 
     void FileSystemBuddyHeap::Finalize() {

libraries/libstratosphere/source/fssystem/buffers/fssystem_file_system_buffer_manager.cpp

@@ -40,7 +40,7 @@ namespace ams::fssystem {
         m_cache_count_min = max_cache_count / 16;
         m_cache_size_min  = m_cache_count_min * 0x100;
 
-        return ResultSuccess();
+        R_SUCCEED();
     }
 
     void FileSystemBufferManager::CacheHandleTable::Finalize() {