ring-buffer: Remove jump to out label in ring_buffer_swap_cpu()

The function ring_buffer_swap_cpu() has a bunch of jumps to the label out
that simply returns "ret". There's no reason to jump to a label that
simply returns a value. Just return directly from there.

This goes back to almost the beginning when commit 8aabee573dff
("ring-buffer: remove unneeded get_online_cpus") was introduced. That
commit removed a put_online_cpus() from that label, but never updated all
the jumps to it that now no longer needed to do anything but return a
value.

Cc: Mathieu Desnoyers <[email protected]>
Link: https://lore.kernel.org/[email protected]
Reviewed-by: Masami Hiramatsu (Google) <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>

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