ams: globally prefer R_RETURN to return for ams::Result

libraries/libstratosphere/source/fssystem/fssystem_key_slot_cache.hpp

@@ -73,11 +73,11 @@ namespace ams::fssystem {
             constexpr KeySlotCache() : m_mutex(), m_high_priority_mru_list(), m_low_priority_mru_list() { /* ... */ }
 
             Result AllocateHighPriority(std::unique_ptr<KeySlotCacheAccessor> *out, const void *key, size_t key_size, s32 key2) {
-                return this->AllocateFromLru(out, m_high_priority_mru_list, key, key_size, key2);
+                R_RETURN(this->AllocateFromLru(out, m_high_priority_mru_list, key, key_size, key2));
             }
 
             Result AllocateLowPriority(std::unique_ptr<KeySlotCacheAccessor> *out, const void *key, size_t key_size, s32 key2) {
-                return this->AllocateFromLru(out, m_high_priority_mru_list, key, key_size, key2);
+                R_RETURN(this->AllocateFromLru(out, m_high_priority_mru_list, key, key_size, key2));
             }
 
             Result Find(std::unique_ptr<KeySlotCacheAccessor> *out, const void *key, size_t key_size, s32 key2) {