arm64: xilinx: Enable EFI_HTTP_BOOT by default

Enable EFI_HTTP_BOOT to be able to booting OS via http.
In case of that dhcp server is not providing dns server IP set it up via
setenv dnsip <ip addr>.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/b78a7d8b0100c724f657c0997b273e073cf31a14.1706093917.git.michal.simek@amd.com
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
index 5f76a30..3c55dd8 100644
--- a/configs/xilinx_versal_virt_defconfig
+++ b/configs/xilinx_versal_virt_defconfig
@@ -153,3 +153,4 @@
 CONFIG_VIRTIO_NET=y
 CONFIG_VIRTIO_BLK=y
 CONFIG_TPM=y
+CONFIG_EFI_HTTP_BOOT=y