imx6: wandboard: convert to DM_USB

Drop CONFIG_USB_MAX_CONTROLLER_COUNT and enable DM_USB
in defconfig.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/configs/wandboard_defconfig b/configs/wandboard_defconfig
index 11cf441..9e13d7f 100644
--- a/configs/wandboard_defconfig
+++ b/configs/wandboard_defconfig
@@ -46,6 +46,7 @@
 CONFIG_PINCTRL_IMX6=y
 CONFIG_DM_THERMAL=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_VIDEO=y
 CONFIG_VIDEO_IPUV3=y
 # CONFIG_VIDEO_SW_CURSOR is not set
diff --git a/include/configs/wandboard.h b/include/configs/wandboard.h
index e6d1fca..e01e3e3 100644
--- a/include/configs/wandboard.h
+++ b/include/configs/wandboard.h
@@ -51,7 +51,6 @@
 #define CONFIG_SYS_FSL_ESDHC_ADDR	0
 
 /* USB Configs */
-#define CONFIG_USB_MAX_CONTROLLER_COUNT	2
 #define CONFIG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
 #define CONFIG_MXC_USB_FLAGS		0