usb: phy: Kconfig: Add MSM_HSUSB_PHY config entry

The snapshot for the phy-msm-snps-hs driver omitted the Kconfig
entry which is needed for compilation.

Change-Id: I884f7b61401e84d7b87151c6cf385c7fa2f288c0
Signed-off-by: Jack Pham <jackp@codeaurora.org>