msm: kgsl: Use msecs_to_jiffies for ADRENO_IDLE_TIMEOUT

This change is about to cherrypick of missing code part
from Change-Id: Ic0dedbad33630706d909931bf616bd69399f7ff1

Change-Id: I6c9766be0651e99251e1cb280f92e06e47875b4f
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>
Merge pull request #4 from CyanogenMod/cm-10.2

msm: kgsl: Use msecs_to_jiffies for ADRENO_IDLE_TIMEOUT