serial: Add CONSOLE_POLL support for uartlite
CONSOLE_POLL support for uartlite enables KGDB debugging over serial line. Signed-off-by: NMichal Simek <monstr@monstr.eu> Signed-off-by: NJason Wessel <jason.wessel@windriver.com> Acked-by: NPeter Korsgaard <jacmet@sunsite.dk> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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