ASoC: mchp-spdifrx: fix typo

Fix typo in log describing failure of devm_snd_dmaengine_pcm_register().

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220311112818.1482372-1-claudiu.beznea@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>