package/exfat-utils: indicate difference with exfatprogs in Config.in help

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/exfat-utils/Config.in

@@ -4,6 +4,13 @@ config BR2_PACKAGE_EXFAT_UTILS
 	help
 	  exFAT filesystem utilities.
 
+	  This is the set of user-space utilities that go together
+	  with the FUSE-based exfat driver from package/exfat.
+
+	  If you're using the exfat driver from the official Linux
+	  kernel (merged as of Linux 5.7), you must use the user-space
+	  utilities from package/exfatprogs.
+
 	  https://github.com/relan/exfat
 
 comment "exfat-utils needs a toolchain w/ wchar"