usb: qusb: Do not disable PHY resources upon spoof disconnect

The PMIC firmware is no more enabling the resources required
for the PHY for the EUD usecase.
So, if the required resources for the PHY are turned off
as part of spoof disconnect the EUD fails to work.
Fix this by keeping the PHY resources enabled as part
of spoof disconnect.

Change-Id: I2ee734eec0c78b062d2e0726e9efa5a88db8c02d
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>