ARM: dts: msm: move UFS ref clk pad supply to controller node in SDM845

This patch moves the ref-clk pad supply property from the UFS PHY node
to UFS host controller node. With this, we can easily turn off the
ref clk supply when link is turned off.

Change-Id: I56cb505d42bfecc8ef819948c21f82a07eba1d1f
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>