phy: phy-qcom-ufs: add receive line configuration

This is a snapshot of UFS phy driver taken as of commit
<Iece7757565b>
("ufs: Porting UFS driver's changes from kernel msm-4.14
to msm-kona")

Exposes a receive line configuration function.
This is to make sure that the RX LineCfg is enabled
before link-startup.

Change-Id: I73eb0caf65f14d7444c1c90228d2384e028ddbdc
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>