scsi: ufs: ufs-qcom: Enter and exit hibern8 during clock scaling

Qualcomm controller needs to be in hibern8 before scaling clocks.  This
change puts the controller in hibern8 state before scaling and brings it
out after scaling of clocks.

Link: https://lore.kernel.org/r/212b7aaf6d834c4a8c682fdac4a59b84013ed573.1632818942.git.nguyenb@codeaurora.org


Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit a0cea83332ae2ba4b740a89fc094aba3298825db)
Signed-off-by: Ondrej Kubik <ondrej.kubik@canonical.com>