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Read from serial console with a small delay to bundle data to e.g. full lines. Reading one character at a time is not needed and causes busy looping. (From OE-Core rev: ab1e3000cee9f5f3496a7e67cc59b2e08a681a89) Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org> Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> (cherry picked from commit 0049f6757f6f956fb4cc77b3df6a672c20b53cf4) Signed-off-by: Steve Sakoman <steve@sakoman.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>