Replace hardcoded values in ndn-cxx by MAX_NDN_PACKET_SIZE

Change-Id: I0e116cd2a39781f0d56e156ac517ecadd49b8741
Refs: #3407
diff --git a/src/encoding/block.cpp b/src/encoding/block.cpp
index 7306276..3e2d518 100644
--- a/src/encoding/block.cpp
+++ b/src/encoding/block.cpp
@@ -43,7 +43,7 @@
               "Block must be MoveAssignable with noexcept");
 #endif // NDN_CXX_HAVE_IS_NOTHROW_MOVE_ASSIGNABLE
 
-const size_t MAX_SIZE_OF_BLOCK_FROM_STREAM = 8800;
+const size_t MAX_SIZE_OF_BLOCK_FROM_STREAM = MAX_NDN_PACKET_SIZE;
 
 Block::Block()
   : m_type(std::numeric_limits<uint32_t>::max())