[no subject]

[Jaegeuk Kim]

Change log from v3:
 - use __ufshcd_release with a fix in __ufshcd_release

Change log from v2:
 - use active_req-- instead of __ufshcd_release to avoid UFS timeout

Change log from v1:
 - remove clkgating_enable check in __ufshcd_release
 - use __uhfshcd_release instead of active_req.