usb: phy: qmp: Add QMP USB DP combo PHY related functionality

This change adds QMP USB DP combo PHY related initialization and
reset sequence using required set of register set. Global reset is
not required to perform when there is no port select change with
QMP USB DP combo PHY.

vls_clamp_reg related offset and phy_phy_reset are not needed with
QMP USB DP combo PHY. Hence fail probe only if these properties are
not available for USB only PHY.

Change-Id: Ib56df85fd0210ba6ad24a5865330fc43c957b284
Signed-off-by: Mayank Rana <mrana@codeaurora.org>