[PATCH 1/4] OPP: Improve error handling in dev_pm_opp_of_cpumask_add_table()

The error handling wasn't appropriate in dev_pm_opp_of_cpumask_add_table(). For example it returns 0 on success and also for the case where cpumask is empty or cpu_device wasn't found for any of the CPUs. It should really return error on such cases, so that the callers can be aware of the

[PATCH 1/4] OPP: Improve error handling in dev_pm_opp_of_cpumask_add_table()

The error handling wasn't appropriate in dev_pm_opp_of_cpumask_add_table(). For example it returns 0 on success and also for the case where cpumask is empty or cpu_device wasn't found for any of the CPUs. It should really return error on such cases, so that the callers can be aware of the