scsi: ufs-msm: add clock frequency table for Rate B

The UFS driver is now supporting working in HS (High Speed), Rate B.
Hence, we need to add a static table of clock frequency for rate B gears.

Also, this change fixes array access to index -1, in certain corner
cases, and report illegal values that are returned from
msm_ufs_cfg_timers() routine

Change-Id: Id05321c4fd3ebcc509c6b53f3722c3acfb48cad3
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>