Add device ID 0x437, a dual-bank part with 512KB total. This one used
the Medium+/HD flash size register to read the flash size in Kb rather
than the 0/1 code in the Medium+ parts.
Signed-off-by: Andrey Yurovsky <yurovsky@gmail.com>
Change-Id: I870fe3bb1b473939b7211c3b2edb44b4b3643648
Reviewed-on: http://openocd.zylin.com/1790
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>