Update the default configuration for the following AT91-based boards:
   Embest ATEB9200
   Cogent CSB337
   Cogent CSB637
   Sperry-Sun KAFA
   Picotux200
Signed-off-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>