Due to unknown legacy reason, the rates received by the driver from the
firmware are currently divided by 500 to convert it into units of
500kbps. This division by 500 is later compensated by a multiplication
with 5 to maintain units of 100kbps before being sent to the upper
layer. This division and then subsequent multiplication results in the
loss of precision (in the case the rate is not divisible by 5).
Consequently, the rate being sent to the upper layer becomes inaccurate.
Also the calculation of the MCS rate flags is affected.
Do not carry out the unnecessary division and multiplication by 5.
Instead just convert the rates into units of 100kbps (which is as
mandated by the kernel) when driver receives the rate from the firmware.
Change-Id: Iab7b825f4067ad51174a0c545cf4a7d0ab426171
CRs-Fixed: 2378167
195164b7bb