Taken from git://git.ac6.fr/openocd commit e8ed67c42227b7072
STM32F446 (0x434) now is's own case.
Change-Id: I5061db7102b4c923c9f39d3d2f0cc69d29fca0a4
Signed-off-by: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Reviewed-on: http://openocd.zylin.com/3375
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>