cpuidle: Avoid assignment in if () argument

Clean up cpuidle_enable_device() to avoid doing an assignment
in an expression evaluated as an argument of if (), which also
makes the code in question more readable.

Signed-off-by: Gaurav Jindal <gauravjindal1104@gmail.com>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Gaurav Jindal 2017-09-02 00:56:38 +05:30 • committed by Rafael J. Wysocki
commit 3fc74bd8a7