regulator: fp9931: Fix PM runtime reference leak in fp9931_hwmon_read()

regulator: fp9931: Fix PM runtime reference leak in fp9931_hwmon_read()

In fp9931_hwmon_read(), if regmap_read() failed, the function returned
the error code without calling pm_runtime_put_autosuspend(), causing
a PM reference leak.

Fixes: 12d821bd13d4 ("regulator: Add FP9931/JD9930 driver")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Reviewed-by: Andreas Kemnade <andreas@kemnade.info>
Link: https://patch.msgid.link/20260224-fp9931-v1-1-1cf05cabef4a@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>