platform/x86: hp-wmi: Fix tablet mode detection for convertibles

platform/x86: hp-wmi: Fix tablet mode detection for convertibles

commit 9968e12a291e639dd51d1218b694d440b22a917f upstream.

Commit f9cf3b2880cc ("platform/x86: hp-wmi: Refactor dock and tablet
state fetchers") consolidated the methods for docking and laptop mode
detection, but omitted to apply the correct mask for the laptop mode
(it always uses the constant for docking).

Fixes: f9cf3b2880cc ("platform/x86: hp-wmi: Refactor dock and tablet state fetchers")
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Cc: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>