xilinx: Enable support for SquashFS

Enable SquashFS for all xilinx platforms.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/dbe85afda8cd90ebfc537979d382808ff9bec160.1655982259.git.michal.simek@amd.com
diff --git a/configs/xilinx_zynq_virt_defconfig b/configs/xilinx_zynq_virt_defconfig
index 120bc29..489e86a 100644
--- a/configs/xilinx_zynq_virt_defconfig
+++ b/configs/xilinx_zynq_virt_defconfig
@@ -58,6 +58,7 @@
 CONFIG_CMD_TIME=y
 CONFIG_CMD_TIMER=y
 CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_SQUASHFS=y
 CONFIG_CMD_MTDPARTS=y
 CONFIG_CMD_MTDPARTS_SPREAD=y
 CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES=y