ASoC: MAINTAINERS: Drop incorrect tlv320aic31xx.txt path

ASoC: MAINTAINERS: Drop incorrect tlv320aic31xx.txt path

tlv320aic31xx.txt was converted to DT schema (YAML) and new file is
already matched by wildcard.  This fixes get_maintainers.pl self-test
warning:

  ./MAINTAINERS:22739: warning: no file matches	F:	Documentation/devicetree/bindings/sound/tlv320aic31xx.txt

Fixes: e486feb7b8ec ("ASoC: dt-bindings: convert tlv320aic31xx.txt to yaml")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240825085745.21668-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>