ARM: imx: Enable cat and xxd commands on Data Modul i.MX8M Mini/Plus eDM SBC

Enable 'cat' command to print file from filesystem to stdout.
Enable 'xxd' command to hexdump file from filesystem to stdout.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/configs/imx8mm_data_modul_edm_sbc_defconfig b/configs/imx8mm_data_modul_edm_sbc_defconfig
index f26a879..17ebe5e 100644
--- a/configs/imx8mm_data_modul_edm_sbc_defconfig
+++ b/configs/imx8mm_data_modul_edm_sbc_defconfig
@@ -105,6 +105,8 @@
 CONFIG_CMD_USB=y
 CONFIG_CMD_USB_SDP=y
 CONFIG_CMD_USB_MASS_STORAGE=y
+CONFIG_CMD_CAT=y
+CONFIG_CMD_XXD=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_DHCP6=y
 CONFIG_CMD_TFTPPUT=y