imx: mx7dsabresd: enable DM_SERIAL
Enable CONFIG_DM_SERIAL, and `dm tree` could show:
serial 1 [ ] serial_mxc | |-- serial@30a80000
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/configs/mx7dsabresd_defconfig b/configs/mx7dsabresd_defconfig
index 28fc367..d8c5dbc 100644
--- a/configs/mx7dsabresd_defconfig
+++ b/configs/mx7dsabresd_defconfig
@@ -67,6 +67,7 @@
CONFIG_DM_REGULATOR_PFUZE100=y
CONFIG_DM_REGULATOR_FIXED=y
CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_DM_SERIAL=y
CONFIG_MXC_UART=y
CONFIG_SPI=y
CONFIG_DM_SPI=y