scsi: ufs: prevent illegal icc level configuration

When device power descriptor values are not aligned with regulators
values, ufshcd_find_max_sup_active_icc_level returns an illegal value.
This will cause the write attribute query to fail with illegal value
error.

Change-Id: I8082356bf21039c2ee7018640c8f1067631e9289
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Raviv Shvili <rshvili@codeaurora.org>