If a dev command times out, clk_scaling.active_reqs is not decreased which
causes abnormal clock scaling.

It is complicated to handle different dev command timeout cases in both
legacy mode and MCQ mode. Besides, dev cmds are rarely used and the busy
time is short.

Remove clock scaling busy window for dev cmds like we do for UIC or TM cmds
which don't update busy window either.
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20231004062454.29165-1-peter.wang@mediatek.comReviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>