alienware-wmi: cover some scenarios where memory allocations would fail
alienware-wmi: cover some scenarios where memory allocations would fail

Intel test builder caught a few instances that should test if kzalloc failed to
allocate memory as well as a scenario that platform_driver wasn't properly
initialized.

Signed-off-by: Mario Limonciello <5f7ccc2404acc789903099aae7050baa5ea9d2d9@dell.com>
Signed-off-by: Matthew Garrett <d1dada306f6f6bc535ec5238317ee8d221588a1a@nebula.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs