xilinx: Enable SF_TEST command for all ARM based platforms

Enable this command by default.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
index 34ff8dd..40a8cfd 100644
--- a/configs/xilinx_versal_virt_defconfig
+++ b/configs/xilinx_versal_virt_defconfig
@@ -28,6 +28,7 @@
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_MTD=y
+CONFIG_CMD_SF_TEST=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_TFTPPUT=y
 CONFIG_CMD_CACHE=y