configs: Remove CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS in all boards

Now that EHCD does not use CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS,
remove it in all boards' config files.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/mvebu_armada-37xx.h b/include/configs/mvebu_armada-37xx.h
index feb8112..1307d21 100644
--- a/include/configs/mvebu_armada-37xx.h
+++ b/include/configs/mvebu_armada-37xx.h
@@ -93,12 +93,7 @@
 #define CONFIG_NET_RETRY_COUNT	50
 #define CONFIG_PHY_MARVELL
 
-/* USB 2.0 */
-#define CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS 3
-
-/* USB 3.0 */
-#define CONFIG_USB_MAX_CONTROLLER_COUNT (CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS + \
-					 3)
+#define CONFIG_USB_MAX_CONTROLLER_COUNT (3 + 3)
 
 /* USB ethernet */
 #define CONFIG_USB_HOST_ETHER