ACPI / fan: remove no need check for device pointer
ACPI / fan: remove no need check for device pointer

The device pointer will not be NULL in the PM callback and ACPI driver's
add/remove callback, so checking NULL for them isn't necessary.

Signed-off-by: Aaron Lu <e835aaae27ef45c770cbc83733586d01aadc3a43@intel.com>
Signed-off-by: Zhang Rui <f2a4cf793007be8f81a774dc7806c1ffea7b4a2c@intel.com>

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