ppc: qemu: Enable OF_CONTROL

The QEMU ppce500 machine generates a device tree blob and passes
it to U-Boot during boot. Let's enable OF_CONTROL with OF_BOARD
and provide board_fdt_blob_setup() in the board codes.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/qemu-ppce500_defconfig b/configs/qemu-ppce500_defconfig
index 25fcd41..4522e18 100644
--- a/configs/qemu-ppce500_defconfig
+++ b/configs/qemu-ppce500_defconfig
@@ -22,6 +22,8 @@
 # CONFIG_CMD_HASH is not set
 CONFIG_CMD_EXT2=y
 CONFIG_DOS_PARTITION=y
+CONFIG_OF_CONTROL=y
+CONFIG_OF_BOARD=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 # CONFIG_MMC is not set
@@ -29,4 +31,3 @@
 CONFIG_SYS_NS16550=y
 CONFIG_ADDR_MAP=y
 CONFIG_PANIC_HANG=y
-CONFIG_OF_LIBFDT=y