Maximum frequency wasn't tested on hardware but the docs seem to be
quite explicit and do not mention any restrictions for that.
Change-Id: Idcf58df5358d06525e683f07c76eedad8f0b292d
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/2120
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>