treewide: Rename PHY_INTERFACE_MODE_COUNT to PHY_INTERFACE_MODE_MAX

Rename constant PHY_INTERFACE_MODE_COUNT to PHY_INTERFACE_MODE_MAX to
make it compatible with Linux' naming.

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
diff --git a/include/phy_interface.h b/include/phy_interface.h
index f075abe..494bc87 100644
--- a/include/phy_interface.h
+++ b/include/phy_interface.h
@@ -41,7 +41,7 @@
 	PHY_INTERFACE_MODE_USXGMII,
 	PHY_INTERFACE_MODE_NONE,	/* Must be last */
 
-	PHY_INTERFACE_MODE_COUNT,
+	PHY_INTERFACE_MODE_MAX,
 } phy_interface_t;
 
 static const char * const phy_interface_strings[] = {