arm: am335x: Enable SPL_OF_CONTROL on some configs

Both am335x_boneblack_vboot and am335x_evm_spiboot require
SPL_OF_CONTROL to function but are currently missing this option.  Add
it.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/am335x_boneblack_vboot_defconfig b/configs/am335x_boneblack_vboot_defconfig
index e720e1d..d7c1a76 100644
--- a/configs/am335x_boneblack_vboot_defconfig
+++ b/configs/am335x_boneblack_vboot_defconfig
@@ -31,6 +31,7 @@
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_BOOTP_DNS2=y
 CONFIG_OF_CONTROL=y
+CONFIG_SPL_OF_CONTROL=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
diff --git a/configs/am335x_evm_spiboot_defconfig b/configs/am335x_evm_spiboot_defconfig
index 9694893..4fea5ce 100644
--- a/configs/am335x_evm_spiboot_defconfig
+++ b/configs/am335x_evm_spiboot_defconfig
@@ -32,6 +32,7 @@
 CONFIG_CMD_MTDPARTS=y
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_OF_CONTROL=y
+CONFIG_SPL_OF_CONTROL=y
 CONFIG_OF_LIST="am335x-evm am335x-bone am335x-boneblack am335x-evmsk am335x-bonegreen am335x-icev2 am335x-pocketbeagle"
 CONFIG_ENV_OVERWRITE=y
 # CONFIG_ENV_IS_IN_FAT is not set