ARM: am3517_evm: Remove SPL_OF_CONTROL and OF_PLATDATA

After the recomendation, some testing shows like these are unnecessary.

Suggested-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: Adam Ford <aford173@gmail.com>

configs/am3517_evm_defconfig

@@ -33,9 +33,7 @@ CONFIG_MTDIDS_DEFAULT="nand0=omap2-nand.0"
 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_DEFAULT_DEVICE_TREE="am3517-evm"
-CONFIG_SPL_OF_PLATDATA=y
 # CONFIG_ENV_IS_IN_FAT is not set
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_DM_PCA953X=y