scsi: ufs: ufs-qcom: Enable QUnipro Internal Clock Gating

scsi: ufs: ufs-qcom: Enable QUnipro Internal Clock Gating

Enable internal clock gating for Qualcomm UFS host controller by setting
the following attributes to 1 during host controller initialization:

 - DL_VS_CLK_CFG
 - PA_VS_CLK_CFG_REG
 - DME_VS_CORE_CLK_CTRL.DME_HW_CGC_EN

This change is necessary to support the internal clock gating mechanism
in Qualcomm UFS host controller. This is power saving feature and hence
driver can continue to function correctly despite any error in enabling
these feature.

Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com>
Link: https://lore.kernel.org/r/20250714075336.2133-4-quic_nitirawa@quicinc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>