o add fat filesystem test for arm lpc2148

poc/lpc2148_efsl/docs/pages/rmfile.tex

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+\subsubsection*{Purpose}
+Deletes a file.
+\subsubsection*{Prototype}
+\code{esint16 rmfile(FileSystem *fs,euint8* filename);}
+\subsubsection*{Arguments}
+Objects passed to \code{rmfile}:
+\begin{itemize}
+	\item{\code{fs}: pointer to the FileSystem object}
+	\item{\code{filename}: pointer to the path + name of the file to be removed}
+\end{itemize}
+\subsubsection*{Return value}
+Returns 0 if no errors are detected.\\
+\newline
+Returns non-zero if an error is detected, most likely that the file does not exist.
+\subsubsection*{Note}
+If you have opened a file with \code{fopen()}, and you wish to delete it, first
+close all instances of that file. If you do not, you may corrupt the filesystem.
+\subsubsection*{Example}
+\lstset{numbers=left, stepnumber=1, numberstyle=\small, numbersep=5pt, tabsize=4}
+\begin{lstlisting}
+	#include "efs.h"
+
+	void main(void)
+	{
+		EmbeddedFileSystem efsl;
+
+		/* Initialize efsl */
+		DBG((TXT("Will init efsl now.\n")));
+		if(efs_init(&efsl,"/dev/sda")!=0){
+			DBG((TXT("Could not initialize filesystem (err \%d).\n"),ret));
+			exit(-1);
+		}
+		DBG((TXT("Filesystem correctly initialized.\n")));
+
+		/* Delete some files */
+		rmfile(&efsl.myFs,"file0.txt");
+		rmfile(&efsl.myFs,"dir0/file0.txt");
+		
+		/* Close filesystem */
+		fs_umount(&efsl.myFs);
+	}
+\end{lstlisting}