cpufreq: ondemand: Fix checkpatch warnings

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
cpufreq: ondemand: Calculate the timer delay jiffies once

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
1.4.0b4

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>