dt-bindings: Sync include/dt-bindings/phy/phy.h from Linux

Add 4 new phy types which are present in Linux kernel.
DP and SGMII types are used on Xilinx ZynqMP devices.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

include/dt-bindings/phy/phy.h

@@ -15,5 +15,9 @@
 #define PHY_TYPE_PCIE		2
 #define PHY_TYPE_USB2		3
 #define PHY_TYPE_USB3		4
+#define PHY_TYPE_UFS		5
+#define PHY_TYPE_DP		6
+#define PHY_TYPE_XPCS		7
+#define PHY_TYPE_SGMII		8
 
 #endif /* _DT_BINDINGS_PHY */