MA-17897 ASoC: fsl_dsp: Support building as module

Make fsl_dsp_cpu as a separate driver, otherwise below
build error will occur when set CONFIG_SND_SOC_FSL_DSP=m

    ld.lld: error: duplicate symbol: init_module
    >>> defined at fsl_dsp.c
    >>>            sound/soc/fsl/fsl_dsp.o:(init_module)
    >>> defined at fsl_dsp_cpu.c
    >>>            sound/soc/fsl/fsl_dsp_cpu.o:(.init.text+0x0)

Signed-off-by: Jindong <jindong.yue@nxp.com>
Reviewed-by: Shengjiu Wang <shengjiu.wang@nxp.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_dsp_cpu.c b/sound/soc/fsl/fsl_dsp_cpu.c
index e97d09ae0c45..f202cdc4ed72 100644
--- a/sound/soc/fsl/fsl_dsp_cpu.c
+++ b/sound/soc/fsl/fsl_dsp_cpu.c
@@ -95,3 +95,4 @@ static struct platform_driver dsp_audio_driver = {
 	.remove = dsp_audio_remove,
 };
 module_platform_driver(dsp_audio_driver);
+MODULE_LICENSE("GPL v2");