am335x: beagle/evm: add device tree overlay support

TI am33xx devices such as the BeagleBone devices have numerous cape options such
as screens some of which need overlays from the beginning so it makes sense to
enable evice tree overlays.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
diff --git a/configs/am335x_boneblack_defconfig b/configs/am335x_boneblack_defconfig
index 7bfdfa8..3d86c1b 100644
--- a/configs/am335x_boneblack_defconfig
+++ b/configs/am335x_boneblack_defconfig
@@ -37,3 +37,4 @@
 CONFIG_G_DNL_VENDOR_NUM=0x0451
 CONFIG_G_DNL_PRODUCT_NUM=0xd022
 CONFIG_OF_LIBFDT=y
+CONFIG_OF_LIBFDT_OVERLAY=y
diff --git a/configs/am335x_evm_defconfig b/configs/am335x_evm_defconfig
index ff1e43f..3fe845c 100644
--- a/configs/am335x_evm_defconfig
+++ b/configs/am335x_evm_defconfig
@@ -46,3 +46,5 @@
 CONFIG_G_DNL_VENDOR_NUM=0x0451
 CONFIG_G_DNL_PRODUCT_NUM=0xd022
 CONFIG_RSA=y
+CONFIG_OF_LIBFDT=y
+CONFIG_OF_LIBFDT_OVERLAY=y
diff --git a/configs/am335x_evm_nor_defconfig b/configs/am335x_evm_nor_defconfig
index 6ff0aca..d038eb3 100644
--- a/configs/am335x_evm_nor_defconfig
+++ b/configs/am335x_evm_nor_defconfig
@@ -45,3 +45,4 @@
 CONFIG_G_DNL_PRODUCT_NUM=0xd022
 CONFIG_FAT_WRITE=y
 CONFIG_OF_LIBFDT=y
+CONFIG_OF_LIBFDT_OVERLAY=y
diff --git a/configs/am335x_evm_norboot_defconfig b/configs/am335x_evm_norboot_defconfig
index 49f75b2..2f96627 100644
--- a/configs/am335x_evm_norboot_defconfig
+++ b/configs/am335x_evm_norboot_defconfig
@@ -29,3 +29,4 @@
 CONFIG_G_DNL_VENDOR_NUM=0x0451
 CONFIG_G_DNL_PRODUCT_NUM=0xd022
 CONFIG_OF_LIBFDT=y
+CONFIG_OF_LIBFDT_OVERLAY=y
diff --git a/configs/am335x_evm_spiboot_defconfig b/configs/am335x_evm_spiboot_defconfig
index 64b44ff..40c165d 100644
--- a/configs/am335x_evm_spiboot_defconfig
+++ b/configs/am335x_evm_spiboot_defconfig
@@ -34,3 +34,4 @@
 CONFIG_G_DNL_VENDOR_NUM=0x0451
 CONFIG_G_DNL_PRODUCT_NUM=0xd022
 CONFIG_OF_LIBFDT=y
+CONFIG_OF_LIBFDT_OVERLAY=y
diff --git a/configs/am335x_evm_usbspl_defconfig b/configs/am335x_evm_usbspl_defconfig
index a578322..ffd730e 100644
--- a/configs/am335x_evm_usbspl_defconfig
+++ b/configs/am335x_evm_usbspl_defconfig
@@ -37,3 +37,4 @@
 CONFIG_G_DNL_VENDOR_NUM=0x0451
 CONFIG_G_DNL_PRODUCT_NUM=0xd022
 CONFIG_OF_LIBFDT=y
+CONFIG_OF_LIBFDT_OVERLAY=y