configs: P2020: enable CONFIG_DM_USB support

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/P2020RDB-PC_36BIT_NAND_defconfig b/configs/P2020RDB-PC_36BIT_NAND_defconfig
index 7209321..42a1a3e 100644
--- a/configs/P2020RDB-PC_36BIT_NAND_defconfig
+++ b/configs/P2020RDB-PC_36BIT_NAND_defconfig
@@ -78,3 +78,4 @@
 CONFIG_SPI=y
 CONFIG_FSL_ESPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y