LPC: Add SDK I2S drivers

Builds the LPC I2S driver when the corresponding i2sx shim
driver is enabled.

Signed-off-by: Mahesh Mahadevan <[email protected]>

Author: mmahadevan108

mcux/drivers/lpc/CMakeLists.txt

@@ -14,6 +14,7 @@ zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_MCUX	fsl_iap.c)
 zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_LPC	fsl_flashiap.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_MCUX_FLEXCOMM	fsl_spi.c fsl_flexcomm.c)
 zephyr_library_sources_ifdef(CONFIG_UART_MCUX_FLEXCOMM	fsl_usart.c fsl_flexcomm.c)
+zephyr_library_sources_ifdef(CONFIG_I2S_MCUX_FLEXCOMM   fsl_i2s.c fsl_flexcomm.c)
 zephyr_library_sources_ifdef(CONFIG_WDT_MCUX_WWDT	fsl_wwdt.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_MCUX_LPADC	fsl_lpadc.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_MCUX_LPC        fsl_dma.c)