serial: core: Do stop_rx in suspend path for console if console_suspend is disabled

For the case of console_suspend disabled, if back to back suspend/resume
test is executed, at the end of test, sometimes console would appear to
be frozen not responding to input. This would happen because, during
resume, rx transactions can come in before system is ready, malfunction
of rx happens in turn resulting in console appearing to be stuck.

Do a stop_rx in suspend sequence to prevent this.

Signed-off-by: Vijaya Krishna Nivarthi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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