qcacld-3.0: Configure sar sleep index to FW

Currently there is no SAR index is configured to the FW
before device goes into suspend mode.
with the new requirement, configure the sleep mode index
as sar power limit to the FW before device goes into
suspend mode and configure safety mode index to the FW
on wakeup.

Change-Id: Icedbab047ec3bb252f0ed9c1b2baf04d2726a60e
CRs-Fixed: 2617102