drivers/audio: Kconfig: Fix dmic INIT_PRIORITY default value
drivers/audio: Kconfig: Fix dmic INIT_PRIORITY default value

The AUDIO_DMIC INIT_PRIORITY definition is set to 60 by default,
but this value is causing dmic drivers to be initialized prior to
i2s, to which they are dependent from.

Signed-off-by: Armando Visconti <d93ca24ded08d03c3aa60af6d2fd0eb7ce54da11@st.com>

finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr