dt-bindings: phy: Add PHY_TYPE_USXGMII definition

Add definition for USXGMII phy type.

Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220628122255.24265-3-rogerq@kernel.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

include/dt-bindings/phy/phy.h

@@ -22,5 +22,6 @@
 #define PHY_TYPE_QSGMII		9
 #define PHY_TYPE_DPHY		10
 #define PHY_TYPE_CPHY		11
+#define PHY_TYPE_USXGMII	12
 
 #endif /* _DT_BINDINGS_PHY */