Under some circumstances we get POLLHUP which we incorrectly
treat as having a character in the buffer.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
No need to open code a bunch of random termios flags, use cfmakeraw().
Most of the time we want ctrl-c to exit the current simulation, so
make that the default.
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
