Fix building for mx51evk board

Fix:
mx51evk.c:206:6: error: conflicting types for 'board_ehci_hcd_init'
/u-boot/include/usb/ehci-fsl.h:254:5: note: previous declaration of
'board_ehci_hcd_init' was here

We also fix board_ehci_hcd_init() for mx53loco board.
Building for mx53loco worked since <usb/ehci-fsl.h> is
not included here.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/board/freescale/mx53loco/mx53loco.c b/board/freescale/mx53loco/mx53loco.c
index 57170ce..ea4d354 100644
--- a/board/freescale/mx53loco/mx53loco.c
+++ b/board/freescale/mx53loco/mx53loco.c
@@ -79,12 +79,13 @@
 }
 
 #ifdef CONFIG_USB_EHCI_MX5
-void board_ehci_hcd_init(int port)
+int board_ehci_hcd_init(int port)
 {
 	/* request VBUS power enable pin, GPIO[8}, gpio7 */
 	mxc_request_iomux(MX53_PIN_ATA_DA_2, IOMUX_CONFIG_ALT1);
 	gpio_direction_output(IOMUX_TO_GPIO(MX53_PIN_ATA_DA_2), 0);
 	gpio_set_value(IOMUX_TO_GPIO(MX53_PIN_ATA_DA_2), 1);
+	return 0;
 }
 #endif