MPSSE: Add FT232H to supported chips

Change-Id: I1ce1db7eb87a7cdeafc1f8b8b34594f6fa3bf1f8
Signed-off-by: Salvador Arroyo <sarroyofdez@yahoo.es>
Reviewed-on: http://openocd.zylin.com/677


Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
Reviewed-by: Peter Stuge <peter@stuge.se>