scsi: ufs: core: Remove len parameter from ufshcd_set_active_icc_lvl()

len argument is not used anymore in ufshcd_set_active_icc_lvl() function.

Signed-off-by: Arthur Simchaev <Arthur.Simchaev@wdc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>