Update broken web addresses in arch directory.

The patch below updates broken web addresses in the arch directory.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Finn Thain <fthain@telegraphics.com.au>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Reviewed-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

arch/m68k/q40/README

@@ -3,7 +3,7 @@ Linux for the Q40
 
 You may try http://www.geocities.com/SiliconValley/Bay/2602/ for
 some up to date information. Booter and other tools will be also
-available from this place or ftp.uni-erlangen.de/linux/680x0/q40/
+available from this place or http://ftp.uni-erlangen.de/pub/unix/Linux/680x0/q40/
 and mirrors.
 
 Hints to documentation usually refer to the linux source tree in