ASoC: cs42l43: Fix missing error code in cs42l43_codec_probe()

ASoC: cs42l43: Fix missing error code in cs42l43_codec_probe()

When clk_get_optional() fails, the error handling code does a 'goto
err_pm' with ret = 0, which is resturning success on a failure path.

Fix this by assigning the PTR_ERR(priv-mclk) to ret variable.

Fixes: fc918cbe874e ("ASoC: cs42l43: Add support for the cs42l43")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com
Link: https://lore.kernel.org/r/20230829073635.1877367-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Mark Brown <broonie@kernel.org