One person working on a mass-storage driver (the usb protocol
side, not the block subsystem side) ran into a bug in how a
bit of net2280 dma automagic was handled.

This patch fixes it by calling existing dma chain patchup
code when the dma engine was forced to "hiccup" by having
a not-yet-valid entry in it.  The hiccup is needed in this
case since the IN data stage mustn't terminate with a
short transfer (zero length packet); but the status stage
is always a short packet.  The "terminate with short packet"
bit is endpoint state, not request state, so IN dma queues
sometimes need this kind of fixup.