Conghui Chen 65347d38dc hv: vuart: support reliable communication ...

The orignal communication port will lose data when tx is too fast, and
the data in FIFO will be overwritten.
Now, when the FIFO is full, stop sending more data. When the FIFO is not
full, notify the vuart to send more data.

Tracked-On: #3681
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

2019-09-17 09:45:28 +08:00

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