power: qcom: smb2: Add REAL_TYPE property for usb power_supply

Add POWER_SUPPLY_PROP_REAL_TYPE property for usb_psy to present its real
charger type. POWER_SUPPLY_PROP_TYPE in usb_psy is always set to
POWER_SUPPLY_TYPE_USB_PD for healthd to recognize it as an AC charger.
Also add usb_port_psy with POWER_SUPPLY_TYPE_USB type is added for healthd
to recognize it as an USB host. Their ONLINE properties will be updated
according to the VBUS status, type-c mode and real charger type.
With this type being set statically, update the usb phy and pd policy
engine code to look at real type.

Change-Id: I90aa69325cc82b09dfb513c0eeecbc61e092a57f
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>