xilinx: Enable virtio mmio transport and devices

Qemu can create virtio mmio transports and passing devices through it
that's why enable virtio by default on all arm64 based SoCs.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/a2ee18e7e8c1881ce72c5cd13127794a02410696.1679583129.git.michal.simek@amd.com
diff --git a/configs/xilinx_zynqmp_virt_defconfig b/configs/xilinx_zynqmp_virt_defconfig
index e1b241f..df27cd7 100644
--- a/configs/xilinx_zynqmp_virt_defconfig
+++ b/configs/xilinx_zynqmp_virt_defconfig
@@ -91,6 +91,7 @@
 CONFIG_CMD_RTC=y
 CONFIG_CMD_TIME=y
 CONFIG_CMD_GETTIME=y
+CONFIG_CMD_RNG=y
 CONFIG_CMD_TIMER=y
 CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_SMC=y
@@ -230,6 +231,9 @@
 CONFIG_BMP_16BPP=y
 CONFIG_BMP_24BPP=y
 CONFIG_BMP_32BPP=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_NET=y
+CONFIG_VIRTIO_BLK=y
 CONFIG_PANIC_HANG=y
 CONFIG_TPM=y
 CONFIG_SPL_GZIP=y