scsi: ufs: Uninitialized variable in ufshcd_devfreq_target()

scsi: ufs: Uninitialized variable in ufshcd_devfreq_target()

There is one goto where "sched_clk_scaling_suspend_work" is true but
"scale_up" is uninitialized.  It leads to a Smatch uninitialized variable
warning:

drivers/ufs/core/ufshcd.c:1589 ufshcd_devfreq_target() error: uninitialized symbol 'scale_up'.

Fixes: 1d969731b87f ("scsi: ufs: core: Only suspend clock scaling if scaling down")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/c787d37f-1107-4512-8991-bccf80e74a35@moroto.mountain
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>