ARM: am3517_evm: Enable SPL_OF_CONTROL and SPL_OF_PLATDATA

The SPL doesn't have much room, so in order to support OF_CONTROL
in SPL, we need the extra functionality of SPL_OF_PLATDATA.

Adding these features allows us to remove a small part of code without
losing the serial port during SPL.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/am3517_evm_defconfig b/configs/am3517_evm_defconfig
index 6643f93..3b8e290 100644
--- a/configs/am3517_evm_defconfig
+++ b/configs/am3517_evm_defconfig
@@ -30,6 +30,8 @@
 CONFIG_MTDPARTS_DEFAULT="mtdparts=omap2-nand.0:512k(MLO),1920k(u-boot),256k(u-boot-env),8m(kernel),512k(dtb),-(rootfs)"
 CONFIG_CMD_UBI=y
 CONFIG_OF_CONTROL=y
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_SPL_OF_PLATDATA=y
 # CONFIG_ENV_IS_IN_FAT is not set
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_MMC_OMAP_HS=y
@@ -43,3 +45,4 @@
 CONFIG_USB_MUSB_HOST=y
 CONFIG_USB_MUSB_AM35X=y
 CONFIG_BCH=y
+# CONFIG_SPL_OF_LIBFDT is not set