dra7: Allow selecting a new dtb after board detection.

The DRA7 platforms requires that the dtb used in the SPL really matches the
platform  to have the best MMC performances.
To detect the board type/version an I2C EEPROM is read. This requires that
DM is initialized before the detection. As a consequence we must reset the
DM after the board detection is a new dtb would better match the platform.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/configs/dra7xx_evm_defconfig b/configs/dra7xx_evm_defconfig
index a57dc07..2ea1d59 100644
--- a/configs/dra7xx_evm_defconfig
+++ b/configs/dra7xx_evm_defconfig
@@ -34,11 +34,13 @@
 CONFIG_DEFAULT_DEVICE_TREE="dra7-evm"
 CONFIG_OF_LIST="dra7-evm dra72-evm dra72-evm-revc dra71-evm dra76-evm"
 CONFIG_SPL_MULTI_DTB_FIT=y
+CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ=0x9000
 CONFIG_OF_SPL_REMOVE_PROPS="clocks clock-names interrupt-parent"
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_DM=y
 CONFIG_SPL_DM=y
+CONFIG_SPL_DM_DEVICE_REMOVE=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_SPL_REGMAP=y
 CONFIG_SPL_SYSCON=y