include/configs: replace MXC_EHCI_MODE_SERIAL with PORT_PTS_SERIAL

The MXC_EHCI_MODE_ definitions are redundant. Replace MXC_EHCI_MODE_SERIAL
with the equivalent PORT_PTS_SERIAL.

Only the zmx25 platform is affected.

Signed-off-by: Markus Niebel <Markus.Niebel@ew.tq-group.com>
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
diff --git a/include/configs/zmx25.h b/include/configs/zmx25.h
index 88a8854..8b571da 100644
--- a/include/configs/zmx25.h
+++ b/include/configs/zmx25.h
@@ -57,7 +57,7 @@
 #define CONFIG_USB_EHCI_MXC
 #define CONFIG_EHCI_HCD_INIT_AFTER_RESET
 #define CONFIG_MXC_USB_PORT	1
-#define CONFIG_MXC_USB_PORTSC	MXC_EHCI_MODE_SERIAL
+#define CONFIG_MXC_USB_PORTSC	PORT_PTS_SERIAL
 #define CONFIG_MXC_USB_FLAGS	(MXC_EHCI_INTERNAL_PHY | MXC_EHCI_IPPUE_DOWN)
 #define CONFIG_EHCI_IS_TDI
 #endif /* CONFIG_CMD_USB */