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The "fall through" comments found in switch-cases in ALSA xen driver are all superfluous. The kernel coding style allows the multiple cases in a row. Let's remove them. Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20200709111750.8337-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>