platform/x86: hp-wmi: Cleanup exit paths

Several exit paths were more complex than they needed to be. Remove
superfluous conditionals, use labels common cleanup, do not shadow
negative error codes.

Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Tested-by: Carlo Caione <carlo@endlessm.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
1 file changed