ARM: dts: msm: Add AHB2PHY base address for msmtitanium

Add AHB2PHY base address for USB3 device node which is required
for configuring read/write wait time for accessing PHY registers.

Change-Id: I9342b9ada456ea36f92453d06ace9b8df0d7785a
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>