arm64: versal: Enable clock driver

Enable clock driver for Versal.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
index 75f8b98..f924d3e 100644
--- a/configs/xilinx_versal_virt_defconfig
+++ b/configs/xilinx_versal_virt_defconfig
@@ -45,6 +45,7 @@
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_IP_DEFRAG=y
 CONFIG_TFTP_BLOCKSIZE=4096
+CONFIG_CLK_VERSAL=y
 CONFIG_DM_GPIO=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_CADENCE=y