serial: samsung: Add poll_get_char & poll_put_char
The following patch allows users to use KGDB over serial console on board based on Samsung SOC. It has been tested on a board using exynos5. [dianders: changed poll to return NO_POLL_CHAR, which appears to fix 'help' in kgdb; also updated commit message] Signed-off-by: NJulien Pichon <pichon.jln@gmail.com> Signed-off-by: NDoug Anderson <dianders@chromium.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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