phy: qcom-ufs: add support in UFS PHY for sm6150 platform

Add support for new UFS PHY on SM6150 platform.
(Add snapshot of the ufs phy driver from msm-4.14
commit id b790b145296302438d1c8de8faab29dba69efa36).

Change-Id: Iddbe75f9642352d6b3f6228001658314bde76c09
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>