configs: am64x_evm_*_defconfig: Enable High Secure device support

Enable CONFIG_TI_SECURE_DEVICE to support booting High Secure(HS)
variants of AM64x SoC.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
diff --git a/configs/am64x_evm_a53_defconfig b/configs/am64x_evm_a53_defconfig
index b817e62..6485ed1 100644
--- a/configs/am64x_evm_a53_defconfig
+++ b/configs/am64x_evm_a53_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 CONFIG_SKIP_LOWLEVEL_INIT=y
 CONFIG_ARCH_K3=y
+CONFIG_TI_SECURE_DEVICE=y
 CONFIG_SYS_MALLOC_LEN=0x2000000
 CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_SPL_GPIO=y