Update 2.4 maintainer in document

Update the maintainer of 2.4 kernel in Documentations/SubmittingPatches.

Signed-off-by: Li Yang <[e-mail]>
Signed-off-by: Adrian Bunk <[e-mail]>

Documentation/SubmittingDrivers

···
 	If the code area has a general maintainer then please submit it to
 	the maintainer listed in MAINTAINERS in the kernel file. If the
 	maintainer does not respond or you cannot find the appropriate
-	maintainer then please contact Marcelo Tosatti
-	<[e-mail]>.
+	maintainer then please contact Willy Tarreau <[e-mail]>.
 
 Linux 2.6:
 	The same rules apply as 2.4 except that you should follow linux-kernel