FROMGIT: scsi: ufs-qcom: Delay specific time before gate ref clk

After enter hibern8, as UFS JEDEC ver 3.0 requires, a specific gating wait
time is required before disable the device reference clock. If it is not
specified, use the old delay.

Link: https://lore.kernel.org/r/1581392451-28743-8-git-send-email-cang@codeaurora.org


Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Hongwu Su <hongwus@codeaurora.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Bug: 150892981
Change-Id: I44b3cbe583741fcfadbb9952fad1037e08175555
(cherry picked from commit 1cbadd0c331fb151fafc698bf2ecc35122953715
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git

 5.7/scsi-queue)
Signed-off-by: Can Guo <cang@codeaurora.org>