XTX XT25F128A shares it's chip ID with XM25QH128A which got identical
features. Hence there it makes no sense to add it to the driver.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This fixes support for Teltonika RUT9xx which in recent versions of
the device uses xt25f128b flash.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>