arm64: defconfig: enable Rockchip RK3308 internal audio codec driver

This codec now has a driver.
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20240305-rk3308-audio-codec-v4-5-312acdbe628f@bootlin.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/configs/defconfig

@@ -991,6 +991,7 @@ CONFIG_SND_SOC_GTM601=m
 CONFIG_SND_SOC_MSM8916_WCD_ANALOG=m
 CONFIG_SND_SOC_MSM8916_WCD_DIGITAL=m
 CONFIG_SND_SOC_PCM3168A_I2C=m
+CONFIG_SND_SOC_RK3308=m
 CONFIG_SND_SOC_RK817=m
 CONFIG_SND_SOC_RT5640=m
 CONFIG_SND_SOC_RT5659=m