tty: nozomi: remove unneeded break

A break is not needed if it is preceded by a return

Add explicit fallthrough

Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20201019175732.3289-1-trix@redhat.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>