docs: Fix some broken references

As we move stuff around, some doc references are broken. Fix some of
them via this script:
	./scripts/documentation-file-ref-check --fix

Manually checked if the produced result is valid, removing a few
false-positives.

Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Coly Li <colyli@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>

sound/core/Kconfig

@@ -48,7 +48,7 @@ config SND_MIXER_OSS
 	depends on SND_OSSEMUL
 	help
 	  To enable OSS mixer API emulation (/dev/mixer*), say Y here
-	  and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
+	  and read <file:Documentation/sound/designs/oss-emulation.rst>.
 
 	  Many programs still use the OSS API, so say Y.
 
@@ -61,7 +61,7 @@ config SND_PCM_OSS
 	select SND_PCM
 	help
 	  To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
-	  here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
+	  here and read <file:Documentation/sound/designs/oss-emulation.rst>.
 
 	  Many programs still use the OSS API, so say Y.