ARM: dts: msm: Update ref_clk related address for mdmcalifornium

On mdmcalifornium, it is required to turned ON and OFF ref_clk explicitly
before performing QUSB PHY reset and after QUSB PHY initialization
respectively. Hence add ref_clk address value here for QUSB PHY
to perform the same.

Change-Id: Ife6b36e73d6a5e1c9935fcdf61b96d6e7aace51a
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>