Support the following additional baud rates with 0% error:
	500000, 1500000, 2500000, 3500000
Signed-off-by: NAaron Sierra <asierra@xes-inc.com>
Reviewed-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>