mfd: cs42l43: Handle error from devm_pm_runtime_enable()

As it devm_pm_runtime_enable() can fail due to memory allocations, it
is best to handle the error.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20240129152557.3221212-6-ckeepax@opensource.cirrus.com


Signed-off-by: Lee Jones <lee@kernel.org>