ASoC: tegra: tegra20_das: Remove unused function tegra20_das_read

This function is unused since commit 7203a625 ("ASoC: convert
Tegra20 DAS driver to regmap").
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220629194224.175607-2-u.kleine-koenig@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/tegra/tegra20_das.c

@@ -104,14 +104,6 @@ static inline void tegra20_das_write(u32 reg, u32 val)
 	regmap_write(das->regmap, reg, val);
 }
 
-static inline u32 tegra20_das_read(u32 reg)
-{
-	u32 val;
-
-	regmap_read(das->regmap, reg, &val);
-	return val;
-}
-
 static int tegra20_das_connect_dap_to_dac(int dap, int dac)
 {
 	u32 addr;