defconfig: ls1021a: Add OF_CONTROL and DM support

PI and QSPI only work when boot from QSPI on ls1021a.
This patch only enable options in qspi boot defconfig.

Signed-off-by: Haikun Wang <haikun.wang@freescale.com>
Tested-by: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>

configs/ls1021aqds_qspi_defconfig

@@ -3,4 +3,8 @@ CONFIG_TARGET_LS1021AQDS=y
 CONFIG_SYS_EXTRA_OPTIONS="QSPI_BOOT"
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_DEFAULT_DEVICE_TREE="ls1021a-qds"
+CONFIG_OF_CONTROL=y
+CONFIG_DM=y
+CONFIG_DM_SPI=y
 CONFIG_SPI_FLASH=y

configs/ls1021atwr_qspi_defconfig

@@ -3,4 +3,8 @@ CONFIG_TARGET_LS1021ATWR=y
 CONFIG_SYS_EXTRA_OPTIONS="QSPI_BOOT"
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_DEFAULT_DEVICE_TREE="ls1021a-twr"
+CONFIG_OF_CONTROL=y
+CONFIG_DM=y
+CONFIG_DM_SPI=y
 CONFIG_SPI_FLASH=y