ASoC: uniphier: aiodma_rb_get_rp() can be static

Fixes: f37fe2f9 ("ASoC: uniphier: add support for UniPhier AIO common driver")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/uniphier/aio-core.c

@@ -904,7 +904,7 @@ void aiodma_ch_set_enable(struct uniphier_aio_sub *sub, int enable)
 	}
 }
 
-u64 aiodma_rb_get_rp(struct uniphier_aio_sub *sub)
+static u64 aiodma_rb_get_rp(struct uniphier_aio_sub *sub)
 {
 	struct regmap *r = sub->aio->chip->regmap;
 	u32 pos_u, pos_l;