target: msm8996: Add USB secondary port support for SBC8096

In SBC8096,USB secondary Port will be used for fastboot use cases,
We need to configure the right PHY for
successful USB enumeration.
Add secondary Port interrupt, secondary port support in qusb2 PHY,
in USB LK driver and in the init sequence.

Change-Id: Ia91d63608732fbe18d00ffc996214cec925acdce
diff --git a/include/target.h b/include/target.h
index e0a0264..d0d830d 100644
--- a/include/target.h
+++ b/include/target.h
@@ -70,6 +70,7 @@
 
 const char * target_usb_controller();
 void target_usb_phy_reset(void);
+void target_usb_phy_sec_reset(void);
 void target_usb_phy_mux_configure(void);
 target_usb_iface_t * target_usb30_init();
 bool target_is_cdp_qvga();