board: siemens: iot2050: Migrate to OF_UPSTREAM

This requires some tweaking of the defconfig and
board_fit_config_name_match so that the new sources are taken into
account.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
diff --git a/configs/iot2050_defconfig b/configs/iot2050_defconfig
index 22990ba..78db6d2 100644
--- a/configs/iot2050_defconfig
+++ b/configs/iot2050_defconfig
@@ -17,7 +17,7 @@
 CONFIG_ENV_SECT_SIZE=0x20000
 CONFIG_DM_GPIO=y
 CONFIG_SPL_DM_SPI=y
-CONFIG_DEFAULT_DEVICE_TREE="k3-am6528-iot2050-basic"
+CONFIG_DEFAULT_DEVICE_TREE="ti/k3-am6528-iot2050-basic"
 CONFIG_SPL_TEXT_BASE=0x80080000
 CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
@@ -79,7 +79,11 @@
 # CONFIG_ISO_PARTITION is not set
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_UPSTREAM=y
+CONFIG_OF_LIST="ti/k3-am6528-iot2050-basic ti/k3-am6528-iot2050-basic-pg2 ti/k3-am6548-iot2050-advanced ti/k3-am6548-iot2050-advanced-pg2 ti/k3-am6548-iot2050-advanced-m2"
+CONFIG_OF_OVERLAY_LIST="ti/k3-am6548-iot2050-advanced-m2-bkey-usb3 ti/k3-am6548-iot2050-advanced-m2-bkey-ekey-pcie"
 CONFIG_SPL_MULTI_DTB_FIT=y
+CONFIG_SPL_OF_LIST="ti/k3-am6528-iot2050-basic"
 CONFIG_SPL_MULTI_DTB_FIT_NO_COMPRESSION=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y