configs: enable eSDHC device module for P2020RDB board

Enable eSDHC device module for P2020RDB board

Signed-off-by: Yinbo Zhu <yinbo.zhu@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 8d54a0f..de69b1d 100644
--- a/configs/P2020RDB-PC_36BIT_NAND_defconfig
+++ b/configs/P2020RDB-PC_36BIT_NAND_defconfig
@@ -77,3 +77,4 @@
 CONFIG_FSL_ESPI=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
+CONFIG_DM_MMC=y