pico-imx6ul: Add USB Host support

Add USB host support.

Tested by connecting a USB pen drive:

=> usb start
starting USB...
USB0:   Port not available.
USB1:   USB EHCI 1.00
scanning bus 1 for devices... 2 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found

Signed-off-by: Vanessa Maegima <vanessa.maegima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/include/configs/pico-imx6ul.h b/include/configs/pico-imx6ul.h
index f8fe230..f9fc263 100644
--- a/include/configs/pico-imx6ul.h
+++ b/include/configs/pico-imx6ul.h
@@ -52,7 +52,7 @@
 #define CONFIG_EHCI_HCD_INIT_AFTER_RESET
 #define CONFIG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
 #define CONFIG_MXC_USB_FLAGS		0
-#define CONFIG_USB_MAX_CONTROLLER_COUNT	1 /* Only OTG1 port enabled */
+#define CONFIG_USB_MAX_CONTROLLER_COUNT	2
 
 #define CONFIG_CI_UDC
 #define CONFIG_USBD_HS