code: Use std::span where appropriate (#6658)

* code: Use std::span when possible

* code: Prefix memcpy and memcmp with std::

src/core/hle/applets/mint.cpp

@@ -23,7 +23,7 @@ ResultCode Mint::ReceiveParameterImpl(const Service::APT::MessageParameter& para
     Service::APT::CaptureBufferInfo capture_info;
     ASSERT(sizeof(capture_info) == parameter.buffer.size());
 
-    memcpy(&capture_info, parameter.buffer.data(), sizeof(capture_info));
+    std::memcpy(&capture_info, parameter.buffer.data(), sizeof(capture_info));
 
     // TODO: allocated memory never released
     using Kernel::MemoryPermission;