mxs phy has data pin contact and usb charger detector blocks which
can be controlled by software to detect charger type for SDP, CDP and
DCP.
Reviewed-by: NBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: NLi Jun <jun.li@nxp.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>