Fix typo: ELFDATA64MSB -> ELFDATA2MSB

In the table "Machine-specific ELF identification fields" the name of the
value "ELFDATA64MSB" for the EI_DATA entry is wrong.  Replace it by the
correct name "ELFDATA2MSB".

lzsabi.tex

@@ -4007,7 +4007,7 @@ \subsection{Machine Information}
     \midrule
     \texttt{e\_ident[EI\_CLASS]} & \texttt{ELFCLASS\NBITS{}} &
     For all \NBITS{}$\,$bit implementations \\
-    \texttt{e\_ident[EI\_DATA]} & \texttt{ELFDATA\NBITS{}MSB} &
+    \texttt{e\_ident[EI\_DATA]} & \texttt{ELFDATA2MSB} &
     For all Big-Endian implementations \\
     \bottomrule
   \end{tabular}