serial: cascade needless conditionals
Signed-off-by: NAndré Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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Signed-off-by: NAndré Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>