ASoC: rt286: Add depends on I2C

rt286 use I2C as its I/O. So the driver can only available when
I2C is selected.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -464,6 +464,7 @@ config SND_SOC_RL6231
 
 config SND_SOC_RT286
 	tristate
+	depends on I2C
 
 config SND_SOC_RT5631
 	tristate