scsi: ufs: ufs-mediatek: Remove redundant header files

Remove redundant #include of header file <linux/sched/clock.h>.

Link: https://lore.kernel.org/r/20220802235437.4547-2-stanley.chu@mediatek.com


Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>