hwmon: (sis5595) Do PCI error checks on own line

hwmon: (sis5595) Do PCI error checks on own line

Instead of if conditions with line splits, use the usual error handling
pattern with a separate variable to improve readability. Handle error
print with a label instead of trying to chain everything into a single
if condition.

No functional changes intended.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230824132832.78705-14-ilpo.jarvinen@linux.intel.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>