scsi: ufs-qcom: Keep core_clk_unipro on while link is active

If we want to disable clocks to save power but still keep the link active,
core_clk_unipro, like ref_clk, should not be the one being disabled.

Link: https://lore.kernel.org/r/1606356063-38380-3-git-send-email-cang@codeaurora.org


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