ASoC: imx-audmix: Fix return error with devm_clk_get()

The devm_clk_get() can return -EPROBE_DEFER error,
modify the error code to be -EINVAL is not correct, which
cause the -EPROBE_DEFER error is not correctly handled.

This patch is to fix the return error code.

Fixes: b86ef536

 ("ASoC: fsl: Add Audio Mixer machine driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/1694757731-18308-1-git-send-email-shengjiu.wang@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>