scsi: ufs-qcom: update vendor specific unipro attribute per clk freq

Vendor specific unipro DME_VS_CORE_CLK_CLRL attribute setting depends
on the core_clk_unipro frequency. Instead of assuming the certain clock
frequency for this clock, we should use the clock frequency information
received from device tree.

Change-Id: Id551e6765f1cf51fac0aca809708617361118e2d
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>