serial: 8250_omap: Drop check for of_node
8250_omap is DT only driver so dev->of_node always exists. Drop check for existence of valid dev->of_node to simplify omap8250_probe(). Signed-off-by: NVignesh R <vigneshr@ti.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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