configs: imx6sabreauto: Add DM_USB support

Add the DM support for USB. For that, DM_REGULATOR is needed.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/configs/mx6sabreauto_defconfig b/configs/mx6sabreauto_defconfig
index 61d830c..ee1df3f 100644
--- a/configs/mx6sabreauto_defconfig
+++ b/configs/mx6sabreauto_defconfig
@@ -52,9 +52,11 @@
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PHYLIB=y
 CONFIG_MII=y
+CONFIG_DM_REGULATOR=y
 CONFIG_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="FSL"