armv8: ls1012: Enable CONFIG_DM_USB in defconfigs

Enables driver model flag CONFIG_DM_USB for LS1012A platform
in defconfigs.

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/configs/ls1012aqds_qspi_defconfig b/configs/ls1012aqds_qspi_defconfig
index c2d8b64..e104816 100644
--- a/configs/ls1012aqds_qspi_defconfig
+++ b/configs/ls1012aqds_qspi_defconfig
@@ -35,6 +35,7 @@
 CONFIG_DM_SPI=y
 CONFIG_FSL_DSPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y
 CONFIG_USB_STORAGE=y