ARM: dts: mdm: Fix USB related devicetree entries on mdm9640

On msm-3.18 kernel, some of USB related devicetree properties are
renamed or changed which are used with USB controller and PHY drivers.
This change makes necessary changes to get required configuration with
USB peripheral on mdm9640.

CRs-Fixed: 1027681
Change-Id: I86914e6ca5db6831c0e1d5e81d7cb8c4fcab705b
Signed-off-by: Mayank Rana <mrana@codeaurora.org>