scsi: ufs-qcom: Add reset control support for host controller

Add reset control for host controller so that host controller can be reset
as required in its power up sequence.

Link: https://lore.kernel.org/r/1573798172-20534-3-git-send-email-cang@codeaurora.org


Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>