armv8: ls1046a: move CONFIG_CMD_USB to defconfig

Move the macro to defconfig to take effect globally.

Signed-off-by: Gong Qianyu <Qianyu.Gong@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/configs/ls1046aqds_sdcard_ifc_defconfig b/configs/ls1046aqds_sdcard_ifc_defconfig
index 274f91e..f9b400b 100644
--- a/configs/ls1046aqds_sdcard_ifc_defconfig
+++ b/configs/ls1046aqds_sdcard_ifc_defconfig
@@ -27,6 +27,7 @@
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
+CONFIG_CMD_USB=y
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_OF_CONTROL=y
 CONFIG_DM=y