application: nrf5340_audio: Align to new I2S driver

Add the I2S instance property to overlay. This is used to identify
the peripheral instance in the Nordic driver.
Remove I2S0 symbol from Kconfig.
Align audio_i2s module to the new nrfx I2S driver.

Signed-off-by: Jakub Zymelka <[email protected]>

Author: jaz1-nordic

applications/nrf5340_audio/Kconfig.defaults

@@ -48,7 +48,7 @@ config REGULATOR
 config CONTIN_ARRAY
 	default y
 
-config NRFX_I2S0
+config NRFX_I2S
 	default y
 
 config PCM_MIX

applications/nrf5340_audio/boards/nrf5340dk_nrf5340_cpuapp.overlay

@@ -79,4 +79,5 @@
 	pinctrl-0 = <&i2s0_default>;
 	pinctrl-1 = <&i2s0_sleep>;
 	pinctrl-names = "default", "sleep";
+	instance = <0>;
 };

applications/nrf5340_audio/src/modules/audio_i2s.c

@@ -36,7 +36,9 @@ PINCTRL_DT_DEFINE(I2S_NL);
 #error "Current AUDIO_SAMPLE_RATE_HZ setting not supported"
 #endif
 
-static nrfx_i2s_t i2s_inst = NRFX_I2S_INSTANCE(0);
+static nrfx_i2s_t i2s_inst = NRFX_I2S_INSTANCE(NRF_I2S0);
+
+NRFX_INSTANCE_IRQ_HANDLER_DEFINE(i2s, 0, &i2s_inst);
 
 static nrfx_i2s_config_t cfg = {
 	/* Pins are configured by pinctrl. */