ARM: dts: msm: Remove TCSR_QUSB2_PHY_CLAMP_DIG_N_1P8 for SDM660

Remove TCSR_QUSB2_PHY_CLAMP_DIG_N_1P8 resource entry for SDM660
which is not required to set now during disconnect as writing to this
register causes USB3.0 port and USB2.0 ports working independently.

Change-Id: Ifb91c4e493ca1ecd31ef649c9e85acd809b9eec6
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>